Mehmet KILIÇ (2019) “Changes in pulse oximetry levels and factors affecting oxygen saturation during routine upper gastrointestinal endoscopy with or without sedation”, Turkish Journal of Gastroenterology, 17(4), pp. 279–282. Available at: https://tjg.avesjournals.com/index.php/tjg/article/view/2065 (Accessed: 18 July 2025).