Om Parkash, Umar Bhatti, Hasnain Zafar and Saeed Hamid 2020. 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. Journal of the Pakistan Medical Association. 71, 3 (Dec. 2020), 929. DOI:https://doi.org/10.47391/JPMA.1219.