A novel concept of passive loop-forming wire-guided biliary cannulation using an ultra-deep angled tip guidewire (with video) - Tesshin Ban; Yoshimasa Kubota; Takuya Takahama; Shun Sasoh; Satoshi Tanida; Tomoaki Ando; Makoto Nakamura; Takashi Joh (Endoscopy International Open, 2023)