Affiliation: | a Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea b Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea c Department of Internal Medicine, Yeungnam University Hospital, Daegu, Republic of Korea d Department of Internal Medicine, Daegu Catholic University Hospital, Daegu, Republic of Korea e Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea f Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea g Department of Internal Medicine, Pusan National University Hospital, Pusan, Republic of Korea h Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Republic of Korea i Department of Internal Medicine, Kyung Hee University East-West Neo Medical Center, Seoul, Republic of Korea |