1. Department of Gastroenterology, Metabology; Ehime University Graduate School of Medicine; Toon Ehime Japan
2. Department of Epidemiology and Preventive Medicine; Ehime University Graduate School of Medicine; Toon Ehime Japan
3. Epidemiology and Medical Statistics Unit; Translational Research Center; Ehime University Hospital; Toon Ehime Japan
4. Department of Internal Medicine; Matsuyama Shimin Hospital; Matsuyama Ehime Japan
5. Department of Community Medicine; Ehime University Graduate School of Medicine; Toon Ehime Japan
6. Ehime General Health Care Association; Matsuyama Ehime Japan