6May GR, Cotton PB,Edmumds SET,et al. Removal of stones form the bile ductat ER CP without sphincterotomy. Gastrointest Endsco,1993,39:749～754
7Vaira D,Dowsett,JF,Hatfiela ARW,et al.is duodenal divereiculum a risk factor for sphincterotomy?Cut, 1989,30: 939～942
8Mathuna P,Siegenberg D,Gibbons D,et al. The acute and long-term effect of balspincteroplasty on papillary structure in pigs. Gastronintest endosc,1996,44: 650～655
9[1]Rollhauser C, Johnson M, A1 - Kawas FH. Needle- knife papillotomy: helpful and safe adjunct to endoscopic retrograde cholangiopancreatgraphy in a selected population. Endoscoopy, 1998; 30(8) :691 ～696
10[2]Mawogiarnis C, Liatsos C, Romans A, et al. Needle- knife fistulotomy versus needle - knife precut papillotomy for the treatment of common bile duct stones. Gastrointest Endose. 1999;50(3): 334～339
