| Affiliation: | 1. Department of Internal Medicine and Gastroenterology, Tokyo Women's Medical University Yachiyo Medical Center, Chiba, Japan;2. Internal Medicine, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan;3. Dr Etsuko Hashimoto, Internal Medicine, Institute of Gastroenterology, Tokyo Women's Medical University, 8‐1, Kawada‐cho, Shinjyuku‐ku, Tokyo 162‐8666, Japan.;4. Department of Internal Medicine, Tokyo Women's Medical University Yachiyo Medical Center, Chiba, Japan |
