Khan, Rao Saad Ali, Laima Alam, Farrukh Saeed, Farrukh Sher, and Rao Zaid Ali Khan. 2023. “Does Early Application of Needle-Knife Sphincterotomy (NKS) in Patients With Difficult Biliary Cannulation Increase the Risk of PostERCP Pancreatitis? A Single Centre Study”. Pakistan Journal of Medical Sciences 39 (3). https://doi.org/10.12669/pjms.39.3.6777.