1. Cardiovascular Center, Department of Internal Medicine, Seoul National University Bundang Hospital, 82, Gumi-Ro 173 Beon-Gil, Bundang-Gu, Seongnam-Si, Gyeonggi-Do, Korea
2. Department of Internal Medicine, Seoul National University, 101 Daehak-ro, Chong No Gu, Seoul, Korea
3. Cardiovascular Center, Department of Internal Medicine, Seoul National University Hospital, 101 Daehak-ro, Chong No Gu, Seoul, Korea