Needle knife sphincterotomy does not increase the risk of pancreatitis in patients with difficult biliary cannulation.
Swan MP, Alexander S, Moss A, Williams SJ, Ruppin D, Hope R, Bourke MJ. Needle knife sphincterotomy does not increase the risk of pancreatitis in patients with difficult biliary cannulation. Clin Gastroenterol Hepatol. 2013 Apr; 11(4):430-436.e1.