- Correspondence to Eun-Seok Jeon, Division of Cardiology, Department of Medicine, Cardiac and Vascular Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea;
- Received May 5, 2017
- Revised September 9, 2017
- Accepted September 11, 2017
- First published October 5, 2017.
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