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Om Parkash, Umar Bhatti, Hasnain Zafar, Saeed Hamid. Demonstrating competence in Endoscopic Retrograde Cholangiopancreaticography (ERCP): recently credentialed operator’s performance for deep biliary cannulation over 1 year period from tertiary care hospital in Pakistan. J Pak Med Assoc [Internet]. 2020 Dec. 21 [cited 2026 Jul. 27];71(3):929. Available from: https://www.jpma.org.pk/index.php/public_html/article/view/1329