1. Department of Medicine; Teikyo University School of Medicine; 2-11-1 Kaga Itabashi-ku Tokyo 173-8605 Japan
2. Department of General Medicine; Hiroshima University Graduate School of Medical Science; Programs of Applied Medicine; Clinical Pharmacotherapy; Hiroshima Japan
3. Third Department of Internal Medicine; Kansai Medical University; Hirakata Japan
4. Digestive and Lifestyle Diseases; Kagoshima University Graduate School of Medical and Dental Sciences; Kagoshima Japan
5. Department of Internal Medicine; Second Teaching Hospital; Fujita Health University; Nagoya Japan