1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
2. Division of Gastroenterology and Hepatology, Mayo Clinic, MN, USA
3. Interventional Endoscopy Program, CentraCare, St Cloud Hospital, MN, USA
4. Department of Clinical Trial, Tokyo Metropolitan Children’s Medical Center, Tokyo, Japan
5. Teikyo Academic Research Center, Teikyo University, Tokyo, Japan
6. Center for Diagnostic and Therapeutic Endoscopy, Keio University Hospital, Tokyo, Japan
7. Department of Gastroenterology and Hepatology, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
8. Division of Gastroenterology, Department of Internal Medicine, National Hospital Organization Saitama National Hospital, Saitama, Japan