1. Department of Gastroenterology; Hiroshima Prefectural Hospital; Hiroshima Japan
2. Department of Gastroenterology and Metabolism; Hiroshima University; Hiroshima Japan
3. Emergency Care; Hiroshima Prefectural Hospital; Hiroshima Japan
4. Pathology; Hiroshima Prefectural Hospital; Hiroshima Japan
5. Department of Oral and Maxillofacial Pathobiology, Basic Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University; Hiroshima Japan