1. Yamamoto H, Sekine Y, Sato Y, Higashizawa T, Miyata T, Iino S et al (2001) Total enteroscopy with a nonsurgical steerable double-balloon method. Gastrointest Endosc 53(2):216–220
2. Huang P, Zhang H, Zhang XF, Zhang X, Lu W, Fan Z (2013) Comparison of endoscopic retrograde cholangiopancreatography performed without radiography and with ultrasound-guidance in the management of acute pancreaticobiliary disease in pregnant patients. Chin Med J 126(1):46–50
3. Chahal P, Baron TH, Topazian MD, Petersen BT, Levy MJ, Gostout CJ (2006) Endoscopic retrograde cholangiopancreatography in post-Whipple patients. Endoscopy 38(12):1241–1245
4. Koornstra JJ (2008) Double balloon enteroscopy for endoscopic retrograde cholangiopancreaticography after Roux-en-Y reconstruction: case series and review of the literature. Neth J Med 66(7):275–279
5. Moreels TG (2012) Altered anatomy: enteroscopy and ERCP procedure. Best Pract Res Clin Gastroenterol 26(3):347–357