1. Department of Medicine, Samsung Medical CenterSungkyunkwan University School of Medicine Seoul Korea
2. Department of Clinical Research Design and Evaluation, SAIHSTSungkyunkwan University Seoul Korea
3. Center for Total Health StudiesKangbuk Samsung Hospital Seoul Korea
4. Center for Health PromotionSamsung Medical Center Seoul Korea
5. National Center for EpidemiologyInstituto de Salud Carlos III Madrid Spain
6. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) Madrid Spain
7. Center for Clinical EpidemiologySamsung Medical CenterSungkyunkwan University Seoul Korea
8. Departments of Epidemiology and Medicine, and Welch Center for Prevention, Epidemiology and Clinical ResearchJohns Hopkins Medical Institutions Baltimore Maryland USA