1. Department of Gastroenterological Surgery, Hyogo Medical University, Hyogo, Japan
2. Department of Pharmacy, Shiga University of Medical Science Hospital, Shiga, Japan
3. Tsumura Kampo Research Laboratories, Tsumura & Co., Ibaraki, Japan
4. Department of Clinical Pharmacology and Therapeutics, Kyoto University Hospital, Kyoto, Japan
5. Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan