Ahmad, H. and Qureshi, A. (1999) “Therapeutic Hepato-Biliary Endoscopy: Future Trends”, Siriraj Medical Journal, 51(4), pp. 293–294. available at: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/264937 (accessed: 29 September 2026).