Muhammad Ayub Naich, Sagheer Hussain, Adeel Qamar, Hina Zamir, Zia Ul Mustafa, Fatima Cheema 2022. Evaluation of Different Types of Gallstones Extracted by Endoscopic Retrograde Cholangiopancreatography. Pakistan Journal of Medical & Health Sciences. 16, 11 (Dec. 2022), 191. DOI:https://doi.org/10.53350/pjmhs20221611191.