Feyzullah ERSÖZ (2019) “Assessment of anxiety levels in patients during elective upper gastrointestinal endoscopy and colonoscopy”, Turkish Journal of Gastroenterology, 21(1), pp. 29–33. Available at: https://tjg.avesjournals.com/index.php/tjg/article/view/2282 (Accessed: 20 July 2025).