Affiliation: | 1. Institute of Health Policy and Management, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea 2. Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, 388-1 Poongnap-2dong Songpa-gu, Seoul, 138-736, South Korea 3. Department of Preventive Medicine, Dong-A University College of Medicine, 26 Daesingongwon-ro, Seo-gu, Busan, 602-715, South Korea 4. Department of Health Policy and Management, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, South Korea
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