Jonghanne Park1, Goo-Yeong Cho1, Kay-Hyun Park1, Il-Young Oh2. 1. From the Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea (J.P.); Department of Internal Medicine (G.-Y.C., I.-Y.O) and Department of Thoracic and Cardiovascular Surgery (K.-H.P.), Seoul National University Bundang Hospital, Gumi-dong, Bundang, Seongnam, Gyeonggi-do, South Korea. 2. From the Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea (J.P.); Department of Internal Medicine (G.-Y.C., I.-Y.O) and Department of Thoracic and Cardiovascular Surgery (K.-H.P.), Seoul National University Bundang Hospital, Gumi-dong, Bundang, Seongnam, Gyeonggi-do, South Korea. ilyoung.oh@snubh.org.