Ponce J, Sala T, Pertejo V et al: Manometric evaluation of sphincter of Oddi after endoscopic sphincterotomy, and in patients with previous surgical sphincterotomy. Endoscopy 15: 249-251, 1983
Geenen JE, Toouli J, Hogan WJ et al: Endoscopic sphincterotomy: follow-up evaluation of effects on the sphincter of Oddi. Gastroenterology 87: 754-758, 1984
Bergman JJGHM, van Berkel AM, Groen AK et al: Biliary manometry, bacterial characteristics, bile composition, and histologic changes fifteen to seventeen years after endoscopic sphincterotomy. Gastrointest Endosc 45: 400-405, 1997
Sugiyama M, Atomi Y: Longterm effects of endoscopic sphincterotomy on gall bladder motility. Gut 39: 856-859, 1996
Sugiyama M, Atomi Y: Follow-up of more than 10 years after endoscopic sphincterotomy for choledocholithiasis in young patients. Br J Surg 85: 917-921, 1998