- Correspondence to Professor Seong Hwan Kim, Division of Cardiology, Department of Medicine, Korea University Ansan Hospital, 516 Gojan-1-dong, Danwon-gu, Ansan-si, Gyeonggi-do 425-707, Korea;
- Received October 15, 2013
- Revised February 20, 2014
- Accepted March 19, 2014
- First published April 10, 2014.
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