LAUSR

1 Itokawa F, Itoi T, Ishii K et al. Singleand double-balloon enteroscopy-assisted endoscopic retrograde cholangiopancreatography in patients with Roux-en-Y plus hepaticojejunostomy anastomosis and Whipple resection. Dig. Endosc. 2014; 26 (Suppl 2): 136–43. 2 Binmoeller KF,Br€ucknerM,Thonke F et al.Treatment of difficult bile duct stones using mechanical, electrohydraulic and extracorporeal shock wave lithotripsy. Endoscopy 1993; 25: 201–6. 3 Itoi T, Ishii K, Sofuni A et al. Ultrathin endoscope-assisted ERCP for inaccessible peridiverticular papilla by a singleballoon enteroscope in a patient with Roux-en Y anastomosis. Dig. Endosc. 2010; 22: 334–6. 4 Itoi T, Sofuni A, Itokawa F. Large dilating balloon to allow endoscopic insertion for successful endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy (with video). J. Hepatobiliary Pancreat. Sci. 2010; 17: 725–58. 5 Yamauchi H, Kida M, Miyazawa S et al. Electrohydraulic lithotripsy under peroral direct cholangioscopy using short-type single-balloon enteroscope for large common bile duct stone in patients with Roux-en-Y gastrectomy. Endoscopy 2015; 47(Suppl 1) UCTNE240–1. Letters, Techniques and Images