- Correspondence to Dr Dong-Ju Choi, Cardiovascular Center/Seoul National University Bundang Hospital, Gumiro 166, Bundang, Seongnam, Gyeonggi-do, 13620, Korea;
- Received March 9, 2015
- Revised August 6, 2015
- Accepted August 7, 2015
- First published August 28, 2015.
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