- Correspondence to Dr Gi-Byoung Nam, Department of Internal Medicine, Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, 88 Olimpic-ro 43 gil, Songpa-gu, Seoul 05505, Korea; Sung-Hwan Kim, Division of Cardiology, Department of Internal Medicine, College of Medicine, Seoul St Mary's Hospital, The Catholic University of Korea, Seoul, Korea;
- Received November 23, 2015
- Revised April 13, 2016
- Accepted April 21, 2016
- First published May 20, 2016.
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