[1] Konkuk University School of Medicine,Department of Family Medicine, Konkuk University Medical Center
[2] Sungkyunkwan University School of Medicine,Department of Family Medicine, Samsung Medical Center
[3] Sungkyunkwan University School of Medicine,Department of Physical and Rehabilitation Medicine, Samsung Medical Center
[4] Seoul National University Hospital,Department of Family Medicine, Healthcare System Gangnam Center
[5] Sungkyunkwan University School of Medicine,Department of Family Medicine, Kangbuk Samsung Hospital