1. Department of Internal Medicine; Korea University Ansan Hospital; Ansan South Korea
2. Department of Internal Medicine; Chonbuk National University Hospital; Jeonju South Korea
3. Department of Internal Medicine; Gachon University Gil Hospital; Incheon South Korea
4. Department of Internal Medicine; Korea University Guro Hospital; Seoul South Korea
5. Department of Internal Medicine; Korea University Anam Hospital; Seoul South Korea
6. Department of Internal Medicine; Uijeongbu St. Mary’s Hospital, The Catholic University of Korea; Seoul Korea
7. Department of Internal Medicine; Konkuk University Hospital; Seoul South Korea
8. Department of Internal Medicine; Hallym University Kangnam Sacred Heart Hospital; Seoul South Korea