1. Kyoto University Graduate School of Medicine and Public Health; Department of Healthcare Epidemiology; Konoe-cho, Yoshida, Sakyo-ku Kyoto Japan 606-8501
2. Hyogo Cancer Center; Department of Surgery; Hyogo Japan
3. Kurashiki Central Hospital; Department of General Medicine; 1-1-1 Miwa Kurashiki Okayama Japan 710-8602
4. Kyoto University Graduate School of Medicine / School of Public Health; Department of Health Promotion and Human Behavior; Yoshida Konoe-cho, Sakyo-ku, Kyoto Japan 606-8501