A safe needle-knife precut papillotomy technique in a patient with a naïve papilla and surgically altered anatomy - Hosono, Kunihiro; Yagi, Shin; Kurita, Yusuke; Hasegawa, Sho; Sato, Takamitsu; Kubota, Kensuke; Nakajima, Atsushi (Endoscopy, 2022)