Journal of Clinical and Diagnostic Research, ISSN - 0973 - 709X

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On Sep 2018




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Prof. Somashekhar Nimbalkar
Head, Department of Pediatrics, Pramukhswami Medical College, Karamsad
Chairman, Research Group, Charutar Arogya Mandal, Karamsad
National Joint Coordinator - Advanced IAP NNF NRP Program
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Department of Pediatrics, Pramukhswami Medical College, Karamsad, Anand, Gujarat.
On Sep 2018




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"Journal of Clinical and Diagnostic Research is at present a well-known Indian originated scientific journal which started with a humble beginning. I have been associated with this journal since many years. I appreciate the Editor, Dr. Hemant Jain, for his constant effort in bringing up this journal to the present status right from the scratch. The journal is multidisciplinary. It encourages in publishing the scientific articles from postgraduates and also the beginners who start their career. At the same time the journal also caters for the high quality articles from specialty and super-specialty researchers. Hence it provides a platform for the scientist and researchers to publish. The other aspect of it is, the readers get the information regarding the most recent developments in science which can be used for teaching, research, treating patients and to some extent take preventive measures against certain diseases. The journal is contributing immensely to the society at national and international level."



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Saraswati Dental College
Lucknow
On Sep 2018




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On Aug 2018




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Dr. Arundhathi. S
MBBS, MD (Pathology),
Sanjay Gandhi institute of trauma and orthopedics,
Bengaluru.
On Aug 2018




Dr. Mamta Gupta,
"It gives me great pleasure to be associated with JCDR, since last 2-3 years. Since then I have authored, co-authored and reviewed about 25 articles in JCDR. I thank JCDR for giving me an opportunity to improve my own skills as an author and a reviewer.
It 's a multispecialty journal, publishing high quality articles. It gives a platform to the authors to publish their research work which can be available for everyone across the globe to read. The best thing about JCDR is that the full articles of all medical specialties are available as pdf/html for reading free of cost or without institutional subscription, which is not there for other journals. For those who have problem in writing manuscript or do statistical work, JCDR comes for their rescue.
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Reviewing articles is no less a pain staking process and requires in depth perception, knowledge about the topic for review. It requires time and concentration, yet I enjoy doing it. The JCDR website especially for the reviewers is quite user friendly. My suggestions for improving the journal is, more strict review process, so that only high quality articles are published. I find a a good number of articles in Obst. Gynae, hence, a new journal for this specialty titled JCDR-OG can be started. May be a bimonthly or quarterly publication to begin with. Only selected articles should find a place in it.
An yearly reward for the best article authored can also incentivize the authors. Though the process of finding the best article will be not be very easy. I do not know how reviewing process can be improved. If an article is being reviewed by two reviewers, then opinion of one can be communicated to the other or the final opinion of the editor can be communicated to the reviewer if requested for. This will help one’s reviewing skills.
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Dr. Mamta Gupta
Consultant
(Ex HOD Obs &Gynae, Hindu Rao Hospital and associated NDMC Medical College, Delhi)
Aug 2018




Dr. Rajendra Kumar Ghritlaharey

"I wish to thank Dr. Hemant Jain, Editor-in-Chief Journal of Clinical and Diagnostic Research (JCDR), for asking me to write up few words.
Writing is the representation of language in a textual medium i e; into the words and sentences on paper. Quality medical manuscript writing in particular, demands not only a high-quality research, but also requires accurate and concise communication of findings and conclusions, with adherence to particular journal guidelines. In medical field whether working in teaching, private, or in corporate institution, everyone wants to excel in his / her own field and get recognised by making manuscripts publication.


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Salient features of the JCDR: It is a biomedical, multidisciplinary (including all medical and dental specialities), e-journal, with wide scope and extensive author support. At the same time, a free text of manuscript is available in HTML and PDF format. There is fast growing authorship and readership with JCDR as this can be judged by the number of articles published in it i e; in Feb 2007 of its first issue, it contained 5 articles only, and now in its recent volume published in April 2011, it contained 67 manuscripts. This e-journal is fulfilling the commitments and objectives sincerely, (as stated by Editor-in-chief in his preface to first edition) i e; to encourage physicians through the internet, especially from the developing countries who witness a spectrum of disease and acquire a wealth of knowledge to publish their experiences to benefit the medical community in patients care. I also feel that many of us have work of substance, newer ideas, adequate clinical materials but poor in medical writing and hesitation to submit the work and need help. JCDR provides authors help in this regards.
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In the era of fast growing newer technologies, and in computer and internet friendly environment the manuscripts preparation, submission, review, revision, etc and all can be done and checked with a click from all corer of the world, at any time. Of course there is always a scope for improvement in every field and none is perfect. To progress, one needs to identify the areas of one's weakness and to strengthen them.
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Every one of us: authors, reviewers, editors, and publisher are responsible for enhancing the stature of the journal. I wish for a great success for JCDR."



Thanking you
With sincere regards
Dr. Rajendra Kumar Ghritlaharey, M.S., M. Ch., FAIS
Associate Professor,
Department of Paediatric Surgery, Gandhi Medical College & Associated
Kamla Nehru & Hamidia Hospitals Bhopal, Madhya Pradesh 462 001 (India)
E-mail: drrajendrak1@rediffmail.com
On May 11,2011




Dr. Shankar P.R.

"On looking back through my Gmail archives after being requested by the journal to write a short editorial about my experiences of publishing with the Journal of Clinical and Diagnostic Research (JCDR), I came across an e-mail from Dr. Hemant Jain, Editor, in March 2007, which introduced the new electronic journal. The main features of the journal which were outlined in the e-mail were extensive author support, cash rewards, the peer review process, and other salient features of the journal.
Over a span of over four years, we (I and my colleagues) have published around 25 articles in the journal. In this editorial, I plan to briefly discuss my experiences of publishing with JCDR and the strengths of the journal and to finally address the areas for improvement.
My experiences of publishing with JCDR: Overall, my experiences of publishing withJCDR have been positive. The best point about the journal is that it responds to queries from the author. This may seem to be simple and not too much to ask for, but unfortunately, many journals in the subcontinent and from many developing countries do not respond or they respond with a long delay to the queries from the authors 1. The reasons could be many, including lack of optimal secretarial and other support. Another problem with many journals is the slowness of the review process. Editorial processing and peer review can take anywhere between a year to two years with some journals. Also, some journals do not keep the contributors informed about the progress of the review process. Due to the long review process, the articles can lose their relevance and topicality. A major benefit with JCDR is the timeliness and promptness of its response. In Dr Jain's e-mail which was sent to me in 2007, before the introduction of the Pre-publishing system, he had stated that he had received my submission and that he would get back to me within seven days and he did!
Most of the manuscripts are published within 3 to 4 months of their submission if they are found to be suitable after the review process. JCDR is published bimonthly and the accepted articles were usually published in the next issue. Recently, due to the increased volume of the submissions, the review process has become slower and it ?? Section can take from 4 to 6 months for the articles to be reviewed. The journal has an extensive author support system and it has recently introduced a paid expedited review process. The journal also mentions the average time for processing the manuscript under different submission systems - regular submission and expedited review.
Strengths of the journal: The journal has an online first facility in which the accepted manuscripts may be published on the website before being included in a regular issue of the journal. This cuts down the time between their acceptance and the publication. The journal is indexed in many databases, though not in PubMed. The editorial board should now take steps to index the journal in PubMed. The journal has a system of notifying readers through e-mail when a new issue is released. Also, the articles are available in both the HTML and the PDF formats. I especially like the new and colorful page format of the journal. Also, the access statistics of the articles are available. The prepublication and the manuscript tracking system are also helpful for the authors.
Areas for improvement: In certain cases, I felt that the peer review process of the manuscripts was not up to international standards and that it should be strengthened. Also, the number of manuscripts in an issue is high and it may be difficult for readers to go through all of them. The journal can consider tightening of the peer review process and increasing the quality standards for the acceptance of the manuscripts. I faced occasional problems with the online manuscript submission (Pre-publishing) system, which have to be addressed.
Overall, the publishing process with JCDR has been smooth, quick and relatively hassle free and I can recommend other authors to consider the journal as an outlet for their work."



Dr. P. Ravi Shankar
KIST Medical College, P.O. Box 14142, Kathmandu, Nepal.
E-mail: ravi.dr.shankar@gmail.com
On April 2011
Anuradha

Dear team JCDR, I would like to thank you for the very professional and polite service provided by everyone at JCDR. While i have been in the field of writing and editing for sometime, this has been my first attempt in publishing a scientific paper.Thank you for hand-holding me through the process.


Dr. Anuradha
E-mail: anuradha2nittur@gmail.com
On Jan 2020

Important Notice

Original article / research
Year : 2024 | Month : January | Volume : 18 | Issue : 1 | Page : PC01 - PC04 Full Version

Evaluation of Variation in the Calot’s Triangle at a Tertiary Care Hospital in Northern Uttar Pradesh, India: A Cross-sectional Study


Published: January 1, 2024 | DOI: https://doi.org/10.7860/JCDR/2024/67329.18871
Pooja Pandey, Abhishek Ranjan, Irfan Khan, Shyamendra Pratap Sharma

1. Junior Resident 3rd Year, Department of General Surgery, MIMS, Barabanki, Uttar Pradesh, India. 2. Junior Resident 2nd Year, Department of General Surgery, MIMS, Barabanki, Uttar Pradesh, India. 3. Assistant Professor, Department of General Surgery, MIMS, Barabanki, Uttar Pradesh, India. 4. Assistant Professor, Department of General Surgery, MIMS, Barabanki, Uttar Pradesh, India.

Correspondence Address :
Dr. Shyamendra Pratap Sharma,
Assistant Professor, Department of General Surgery, Mayo Institute of Medical Sciences, Gadia, Barabanki-225001, Uttar Pradesh, India.
E-mail: remembermepooja@gmail.com

Abstract

Introduction: Cholelithiasis is the most common disease worldwide, and laparoscopic cholecystectomy is the standard treatment of choice. To perform laparoscopic cholecystectomy, it is essential to understand the critical view of safety, which primarily involves the dissection of Calot’s triangle. Anatomical variations in Calot’s triangle exist, and understanding them is crucial to avoid unintended situations during surgery. Mirizzi syndrome, a rare complication in Calot’s triangle, can significantly increase mortality and morbidity rates.

Aim: To evaluate the anatomical variations in the Calot’s triangle.

Materials and Methods: A cross-sectional study was conducted at Mayo Institute of Medical Sciences, Department of General Surgery, from October 2021 to September 2022. The total sample size included 100 patients with gallstone disease who underwent surgical intervention. Intraoperative findings, such as variations in the cystic artery and cystic duct, as well as Mirizzi syndrome grading, were recorded in an Excel sheet and tabulated. The results were expressed in terms of frequency and percentage.

Results: The average age of the patients was 39.42±12.11 years, with females outnumbering males. Among them, 28% had a cystic artery lying outside of Calot’s triangle, and 96% had a cystic artery originating from the right hepatic artery. The remaining 2% originated from an aberrant right hepatic artery, 1% from the left hepatic artery, and 1% from the gastroduodenal artery. Cystic duct variations were found in 5% of cases. Of these, 2% had a short cystic duct (<2 cm), 1% had a long cystic duct (approximately 5 cm), one patient had an absent cystic duct, and one had a low insertion into the common hepatic duct. Mirizzi syndrome Grade-I and Grade-II patients accounted for 4% and 2% respectively, while Grade-III, Grade-IV, and Grade-V each contributed to 1%.

Conclusion: Knowledge of Calot’s triangle variations is crucial, especially for aspiring surgeons, as it helps them make decisions promptly when encountering difficulties during surgery. Understanding the Calot’s region ensures the safety not only of patients but also of surgeons.

Keywords

Cystic artery, Cystic duct, Mirizzi syndrome, Right hepatic artery

The gallbladder, a pear-shaped organ, exhibits various variations, particularly in its ductal system and vascular supply. Cholecystectomy is a common surgical procedure performed worldwide, both through laparoscopic and open approaches. One major concern for the operating surgeon in both types of cholecystectomy is the incidence of bile duct injuries and arterial injuries (1). To prevent such mishaps during surgery, Calot introduced the concept of Calot’s triangle in 1891, which was later modified in 1981 by Rocko and DiGioia. According to the modified concept, the triangle is medially bounded by the hepatic duct, laterally by the cystic duct, and superiorly by the inferior surface of the liver. Its contents include the cystic artery and the Lund lymph node (Table/Fig 1) (2).

The risk of iatrogenic injury is highest when anatomical variations are present [Table/Fig-2,3]. The cystic artery can exhibit variations such as being double, resembling a caterpillar, passing anteriorly to the hepatic duct, and originating from both the gastroduodenal artery and the hepatic artery. Knowledge of cystic artery variations is crucial as injury to it can result in troublesome bleeding (3). Similarly, the cystic duct can present with variations such as absence, duplication, short/long length, and high or low insertion at the hepatic duct (right or left).

In addition to these variations, the distortion of Calot’s triangle due to Mirizzi syndrome poses a significant challenge for surgeons. Mirizzi syndrome is a rare condition caused by external compression from one or multiple large impacted gallstones on the common bile duct or common hepatic duct, leading to the formation of fistulae. It is observed in 0.06-5.7% of cholecystectomy patients (4). Risk factors for developing Mirizzi syndrome include long and short cystic ducts, as well as a parallel running cystic duct that intersects with the common bile duct at a low insertion point. Various grading systems are available for Mirizzi syndrome, ranging from Grade-I, which involves external compression of the common bile duct due to an impacted stone at the neck of the gallbladder, to Grade-V, which includes cholecystocholedochoenteric fistula with or without gallstone ileus (5).

Preoperative diagnosis of Mirizzi syndrome is challenging, making intraoperative findings crucial in determining the appropriate surgical approach. Previously, open surgery was the preferred treatment, but with advancements in technology and surgical skills, laparoscopic techniques can now be used (6). The present study aimed to identify the anatomical variations in Calot’s triangle.

Material and Methods

A cross-sectional study was conducted in the Department of General Surgery at MIMS from October 2021 to September 2022. The study was approved by Institutional Ethical Committee (IEC) with IEC number 313. The study included a total of 100 patients with gallstone disease who underwent surgical intervention.

Inclusion criteria: Both males and females aged >18 years and <75 years were included. Patients with ultrasound-confirmed gallstone disease, including those with intrahepatic gallbladder, previous history of acute cholecystitis, and who provided consent for surgery, were included.

Exclusion criteria: Patients with disseminated vascular coagulopathy, Hepatitis B, Hepatitis C, human immunodeficiency virus, and those who had previously undergone cholecystectomy were excluded from the study.

The variables studied included variations in the cystic duct, such as absence, length (long or short), variations in insertion, spiral union, parallel union, and double cystic duct. Variations in the cystic artery, including double cystic artery, proximal or distal to the right hepatic artery, caterpillar turn, and origination from the gastroduodenal artery, were also assessed. Mirizzi syndrome grading was noted according to the following criteria (7): Grade-IA (presence of cystic duct), Grade-IB (obliteration of cystic duct), Grade-II (<1/3rd compression of the common hepatic duct diameter), Grade-III (>1/3rd compression of the common hepatic duct diameter), and Grade-IV (>1/2 compression of the common hepatic duct diameter). Grade-I is not associated with fistula formation, while Grade-II, III, and IV are associated with fistula formation.

Statistical Analysis

Statistical analysis was performed using an Excel sheet, and the results were expressed in terms of frequency and percentages.

Results

Among the study subjects, the majority 36 (36%) belonged to the 30-39 years age group. The mean age of the study cases was 39.42±12.11 years (Table/Fig 4). Females constituted 84% of the participants, while males accounted for 16%.

Surgical intervention: Regarding surgical intervention, laparoscopic cholecystectomy was attempted in all patients, and it was successfully performed in 95% of cases. Conversion to the open method was required in five cases due to reasons such as excessive bleeding caused by injury to an aberrant hepatic artery, absence of the cystic duct (confirmed with intraoperative cholangiogram (Table/Fig 5)a), and Type-IV Mirizzi syndrome, for which a hepaticoduodenostomy was performed.

Variation of Calot’s triangle: In 72% of cases, the cystic artery was present and located within the triangle as its content, while in 28% of cases, it was adjacent to the cystic duct (Table/Fig 5)c,(Table/Fig 6). Two cases exhibited Moynihan’s hump configuration (Table/Fig 5)b,d.

Typically, the cystic artery arises from the terminal branch of the right hepatic artery, followed by the right hepatic proper and the left hepatic artery (Table/Fig 7).

In 1% of cases, the cystic duct was found to be absent, as confirmed by intraoperative cholangiogram, leading to conversion to an open cholecystectomy (Table/Fig 8).

Mirizzi syndrome was encountered in 9% of the patients, with one patient having a cholecystocholedochoenteric fistula that was referred to the hepatobiliary surgeon (Table/Fig 9).

Discussion

In present study, 28% of the participants had a cystic artery located outside of Calot’s triangle, while 96% of them had a cystic artery originating from the right hepatic artery. Cystic duct variations were observed in 5% of cases.

A retrospective study involving 600 patients reported that 85.5% of patients had a normal Calot’s triangle, and 13% had a cystic artery located outside of the triangle (3). In a cadaver dissection study involving 100 specimens, it was found that 65% had a cystic artery within Calot’s triangle, while 35% had a cystic artery located outside of the triangle. Additionally, 92% of the participants had cystic arteries originating from the right hepatic artery, 4% had an abnormal right hepatic artery, 1% had a gastroduodenal artery, and 1% had a left hepatic artery (8).

In the literature, the prevalence of anatomical variations of the cystic duct ranges between 8.2% and 24% (9). The normal length of the cystic duct is typically 2-4 cm, and it usually inserts into the middle third of the common bile duct, mostly towards the right side (10). Short cystic ducts have been reported in 1.3-2.6% of cases, while absent and double cystic ducts are extremely rare, with reported incidences of 0.3-0.4% (11). Aberrant cystic ducts have also been reported in a small percentage of cases (11). In present study, absent cystic duct was found in 1% of cases, short cystic duct in 2%, long cystic duct in 1%, and low insertion into the common bile duct in 1%, but no double cystic duct was observed.

Mirizzi syndrome is a rare condition, seen in only 0.1% of cases, where an impacted stone compresses the common bile duct (11),(12). The incidence of Mirizzi syndrome in patients undergoing cholecystectomies ranges from 0.7-25% (11). In present study, 9% of cases were diagnosed with Mirizzi syndrome.

Knowledge about anatomical variations is crucial to prevent inadvertent complications. Bile is a chemical irritant, so it is important to be cautious about postoperative bile leakage. Additionally, bleeding due to injury to the cystic artery can lead to liver necrosis, potentially requiring hepatectomy. Therefore, achieving a critical view of safety before clipping or ligating, and ensuring that the structures being cut are not the hepatic artery or common bile duct, is essential to minimise morbidity and mortality rates (12).

Mirizzi syndrome can mimic gallbladder carcinoma, so thorough radiological investigations such as abdominal ultrasound, Computed Tomography (CT) of the abdomen, Magnetic Resonance Cholangiopancreatography (MRCP), and endoscopic retrograde cholangiopancreatography are necessary for accurate diagnosis. The standard treatment approach described in the literature is laparoscopic cholecystectomy, which was performed in present study (12).

Limitation(s)

The study had limitations including a small sample size and being conducted at a single centre. Conducting a multicentre study with a larger sample size would provide a more comprehensive understanding of the topic and contribute to the reevaluation of the area as a region.

Conclusion

The laparoscopic method provides a wide field of vision, making it easier to identify structures in Calot’s triangle. With this improved visualisation, the anatomical variations and rare conditions like Mirizzi syndrome can be identified and addressed promptly, potentially saving the patient’s life and improving their quality of life.

Photographs (Table/Fig 2),(Table/Fig 3) were created by Dr. Pooja Pandey using Microsoft Paint, with references taken from standard textbooks. Photographs (Table/Fig 4)a-c were captured from recorded videos during the surgical procedures.

References

1.
Keus F, De Jong JA, Gooszen HG, van Laarhoven CJ. Laparoscopic versus open cholecystectomy for patients with symptomatic cholecystolithiasis. Cochrane Database Syst Rev. 2006;(4):CD006231. Published 2006 Oct 18. Doi:10.1002/14651858.CD006231. [crossref]
2.
Kumar S, Joshi MK. Calot’s triangle: Proposal to rename it as Calot’s region and the concept of ‘Ducto-Arterial Plane’. Indian J Surg. 2015;77(Suppl 3):899-901. Doi: 10.1007/s12262-014-1057-y. [crossref][PubMed]
3.
Ding YM, Wang B, Wang WX, Wang P, Yan JS. New classification of the anatomic variations of cystic artery during laparoscopic cholecystectomy. World J Gastroenterol. 2007;13(42):5629-34. Doi: 10.3748/wjg.v13.i42.5629. [crossref][PubMed]
4.
Wu YH, Liu ZS, Mrikhi R, Ai ZL, Sun Q, Bangoura G, et al. Anatomical variations of the cystic duct: Two case reports. World J Gastroenterol. 2008;14(1):155-57. Doi: 10.3748/wjg.14.155. PMID: 18176982; PMCID: PMC2673385. [crossref][PubMed]
5.
Clemente G, Tringali A, De Rose AM, Panettieri E, Murazio M, Nuzzo G, et al. Mirizzi Syndrome: Diagnosis and management of a challenging biliary disease. Can J Gastroenterol Hepatol. 2018;2018:6962090. Doi: 10.1155/2018/6962090. [crossref][PubMed]
6.
Chen H, Siwo EA, Khu M, Tian Y. Current trends in the management of Mirizzi Syndrome: A review of literature. Medicine (Baltimore). 2018;97(4):e9691. Doi: 10.1097/MD.0000000000009691. [crossref][PubMed]
7.
[ Jones MW, Ferguson T. Mirizzi Syndrome. [Updated 2023 Apr 24]. In: StatPearls Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK482491.
8.
Tejaswi HL, Dakshayani KR, Ajay N. Prevalence of anatomical variations of cystic artery in South Indian cadavers. Int J Res Med Sci. 2013;1(4):424-28. Doi: 10.5455/2320-6012.ijrms20131122. [crossref]
9.
Talpur KA, Laghari AA, Yousfani SA, Malik AM, Memon AI, Khan SA. Anatomical variations and congenital anomalies of extra hepatic biliary system encountered during laparoscopic cholecystectomy. J Pak Med Assoc. 2010;60(2):89-93.
10.
Renzulli M, Brocchi S, Marasco G, Spinelli D, Balacchi C, Barakat M, et al. A new quantitative classification of the extrahepatic biliary tract related to cystic duct implantation. J Gastrointest Surg. 2021;25(9):2268-79. Doi: 10.1007/s11605-020-04852-8.[crossref][PubMed]
11.
Sarawagi R, Sundar S, Gupta SK, Raghuwanshi S. Anatomical variations of cystic ducts in magnetic resonance cholangiopancreatography and clinical implications. Radiol Res Pract. 2016;2016:3021484. Doi: 10.1155/ 2016/3021484. [crossref][PubMed]
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DOI and Others

DOI: 10.7860/JCDR/2023/67329.18871

Date of Submission: Sep 04, 2023
Date of Peer Review: Nov 01, 2023
Date of Acceptance: Nov 23, 2023
Date of Publishing: Jan 01, 2024

AUTHOR DECLARATION:
• Financial or Other Competing Interests: None
• Was Ethics Committee Approval obtained for this study? Yes
• Was informed consent obtained from the subjects involved in the study? Yes
• For any images presented appropriate consent has been obtained from the subjects. Yes

PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Sep 07, 2023
• Manual Googling: Nov 20, 2023
• iThenticate Software: Nov 21, 2023 (12%)

ETYMOLOGY: Author Origin

EMENDATIONS: 6

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