1. Division of Community Medicine and Career Development; Kobe University Graduate School of Medicine; Kobe Japan
2. Division of General Medicine, Center for Community Medicine; Jichi Medical University School of Medicine; Shimotsuke Japan
3. Department of General Medicine; National Health Insurance Ooma Hospital; Ooma Japan
4. Department of General Medicine; Toyooka Public Hospital; Toyooka Japan
5. Satellite Center of Community Medicine; Ehime University Graduate School of Medicine; Toon Japan
6. Department of General Medicine and Primary Care; University of Tsukuba Hospital; Tsukuba Japan
7. Division of Community Medicine and Medical Education; Kobe University Graduate School of Medicine; Kobe Japan