1. Five years experience of endoscopic sphincterotomy in Japan: a collective study from 25 centres;Nakajima;Endoscopy,1979
2. British experience with duodenoscopic sphincterotomy for removal of bile duct stones;Cotton;Br J Surg,1981
3. Endoscopic papillotomy and removal of gallstones;Seifert;Am J Gastroenterol,1978
4. ERCP and EPT: Italian experience;Montori;Endoscopy,1979
5. Resume of a seminar on endoscopic retrograde sphincterotomy (ERS);Geenen,1981