1. Department of Internal Medicine Kagoshima Kouseiren Hospital Kagoshima Japan
2. Center for Digestive and Liver Diseases Miyazaki Medical Center Hospital Miyazaki Japan
3. Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
4. Department of Hygiene and Public Health National Institute of Fitness and Sports in Kanoya Kagoshima Japan
5. Department of Surgery Kagoshima Kouseiren Hospital Kagoshima Japan