Eun Jin Kim1, Kyung Chan Kim2. 1. Department of Internal Medicine, Daegu Catholic University Medical Center, Daegu Catholic University School of Medicine, 33, Duryugongwon-ro 17-gil, Nam-gu, Daegu, 42472, South Korea. ejkim77@cu.ac.kr. 2. Department of Internal Medicine, Daegu Catholic University Medical Center, Daegu Catholic University School of Medicine, 33, Duryugongwon-ro 17-gil, Nam-gu, Daegu, 42472, South Korea.