Guide Wire Selection (Straight vs. Angled) in Endoscopic Retrograde Cholangiopancreatography Using a Normal Contrast Catheter Performed by a Trainee: A Single-Center Prospective Randomized Controlled Cross-Over StudyTakumi Maki, Goro Shibukawa, Akira Yamamiya et al.|Journal of Clinical Medicine|2023Cited by 5