[1] Shinshu University,Center for Health, Safety, and Environmental Management
[2] Kansai Medical University,Department of Gastroenterology and Hepatology
[3] Kurashiki Central Hospital,Department of Anatomic Pathology
[4] Tohoku University Graduate School of Medicine,Division of Gastroenterology
[5] Graduate School of Tokyo Medical and Dental University,Department of Gastroenterology and Hepatology