Utility of needle-knife fistulotomy as an initial method of biliary cannulation to prevent post-ERCP pancreatitis in a highly selected at-risk group: a single-arm prospective feasibility study

NKF might be feasible as an initial procedure for biliary access in patients with CBD stones who are at high risk for PEP if the procedure is performed by an expert biliary endoscopist. (Clinical trial registration number: KCT0001698.)