- Correspondence to , Department of Cardiology, School of Medicine, Chungnam National University, Chungnam National University Hospital, 282 Munhwa-ro, Jung-gu, Daejeon 35015, Korea;
- Received June 29, 2017
- Revised August 17, 2017
- Accepted August 28, 2017
- First published September 23, 2017.
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