1. The Center for Antibody and Vaccine Therapy Research Hospital The Institute of Medical Science The University of Tokyo TokyoJapan
2. Division of Gastroenterology and Hepatology Department of Internal Medicine St. Marianna University School of Medicine KawasakiJapan
3. Department of Gastroenterology, Rheumatology, and Clinical Immunology Sapporo Medical University School of Medicine SapporoJapan
4. The Institute of Medical Science The University of Tokyo Tokyo Japan