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, School of Medicine; National Institute of Fitness and Sports in Kanoya; Kagoshima Japan
5. Department of Radiology; Kagoshima Kouseiren Hospital; Kagoshima Japan
6. Department of Surgery; Kagoshima Kouseiren Hospital; Kagoshima Japan