1 Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea.
2 Medical Officer, Noncommunicable Diseases and Health Promotion, World Health Organization Regional Office for the Western Pacific, Manila, Philippines.
3 Division of Biostatistics and Epidemiology, Department of Health Policy and Research, Joan & Sanford I. Weill Medical College of Cornell University, NY, USA.
4 Department of Family Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.