1. Department of Clinical Evaluation of Drug Efficacy; School of Pharmacy, Tokyo University of Pharmacy and Life Sciences; 1432-1 Horinouchi Hachioji Tokyo 192-0392 Japan
2. Center for Gastroenterology and Inflammatory Bowel Disease; Ofuna Chuo Hospital; 6-2-24 Ofuna Kamakura Kanagawa 247-0056 Japan