1. Department of Medicine and Bioregulatory Science Graduate School of Medical Sciences Kyushu University Fukuoka Japan
2. Department of Medicine Nihon University School of Medicine Tokyo Japan
3. Department of Gastroenterology and Metabolism Graduate School of Medical Sciences Kyushu University Fukuoka Japan
4. Clinical Education Center Kyushu University Hospital Fukuoka Japan
5. Muta Hospital Fukuoka Japan