Institution: | 1. Center for Gastroenterology, Teine‐Keijinkai Hospital, Sapporo, Japan;2. Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan;3. Advanced Therapeutic Endoscopy, University of North Carolina, Chapel Hill, NC, USA;4. Department of Gastroenterology, Teikyo University Mizonokuchi Hospital, Kawasaki, Japan |