1. Department of Gastroenterology, Tokyo Metropolitan Cancer Detection Center, Japan
2. Department of Internal Medicine, Saga Medical School, Japan
3. Department of Internal Medicine, Imari Arita Kyouritsu Hospital, Japan
4. Department of Gastroenterology, Saku Central Hospital, Japan
5. Foundation for Detection of Early Gastric Carcinoma, Japan
6. Department of Surgery, Imari Arita Kyouritsu Hospital, Japan
7. Department of Pathology and Biodefense, Saga Medical School, Japan