Endoscopic approach for a pinhole-like benign stenosis in a pancreaticojejunal anastomosis using a double-balloon endoscope with a clear long cap attachment - Kasai, Takeshi; Shimatani, Masaaki; Mitsuyama, Toshiyuki; Yamashina, Takeshi; Kano, Masataka; Yuba, Takakuni; Naganuma, Makoto (Endoscopy, 2022)