- Correspondence to Dr Hyung-Kwan Kim, Division of Cardiology, Cardiovascular Center, Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea;
- Received November 7, 2016
- Revised January 25, 2017
- Accepted February 2, 2017
- First published March 9, 2017.
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