1) 1995, M.D. The Catholic University of Korea College of Medicine, Seoul, Korea 2) 2004, Ph.D., The Catholic University of Korea Graduate School, Seoul, Korea 3) 2005 : Assistant professor of Internal Medicine, Uijeongbu St. Mary’s Hospital 4) 2009, Associate professor of Internal Medicine, Seoul St. Mary’s Hospital 4) Sep, 2010~ Feb 2012 ; Visiting Scholar – Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland, USA 4) 2014~ Present ; Professor of Internal Medicine, St. Vincent’s Hospital