1. Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
2. Department of Next Generation Endoscopic Intervention (Project ENGINE), Graduate School of Medicine, Osaka University, Osaka, Japan
3. Department of Cardiovascular Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
4. Terumo Kabushiki Kaisha, Terumo Corporation, Tokyo, Japan