1. Department of Pathophysiology and Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University
2. Tsumura Research Laboratories, Tsumura & Co.
3. Department of Gastroenterology and Hematology, Hokkaido University Graduate School of Medicine
4. Department of Otolaryngology-Head & Neck Surgery, Hokkaido University Graduate School of Medicine
5. Gastroenterology, Tomakomai City General Hospital