1. Department of MedicineTeikyo University School of Medicine Tokyo Japan
2. Hokkaido Chitose College of Rehabilitation Chitose Japan
3. Department of GastroenterologyFukushima Medical University School of Medicine Fukushima Japan
4. Department of General Medicine, Graduate School of Medical Science, Programs of Applied Medicine and Clinical PharmacotherapyHiroshima University, Hiroshima Japan
5. Faculty of Medical TechnologyTeikyo University Tokyo Japan