1. Department of Hygiene and Public Health, Teikyo University School of Medicine
2. Center for Clinical Epidemiology, St. Luke’s International University
3. National Institute of Public Health
4. Division of Clinical Epidemiology, National Tokyo Medical Center Clinical Research Center
5. Department of Pediatrics, Ehime Prefectural Central Hospital
6. Division of General Internal Medicine, Ohta Nishinouchi Hospital
7. Division of General Internal Medicine, Kumamoto University
8. Division of General Internal Medicine, Department of Medicine, St. Luke’s International Hospital