Muhammad Ayub Naich, Sagheer Hussain, Adeel Qamar, Hina Zamir, Zia Ul Mustafa, Fatima Cheema. âEvaluation of Different Types of Gallstones Extracted by Endoscopic Retrograde Cholangiopancreatographyâ. Pakistan Journal of Medical & Health Sciences 16, no. 11 (December 24, 2022): 191. Accessed April 3, 2025. https://pjmhsonline.com/index.php/pjmhs/article/view/3338.