[1] Sungkyunkwan University School of Medicine,Department of Family Medicine, Samsung Medical Center
[2] Health Screening Center Kangbuk Samsung Hospital,Department of Family Medicine, College of Medicine
[3] Sungkyunkwan University School of Medicine,Department of Epidemiology, School of Public Health and Institute of Health Environment
[4] Busan Paik Hospital,undefined
[5] Inje University,undefined
[6] Seoul National University,undefined