- Correspondence to Dr Seong Hwan Kim, Division of Cardiology, Department of Medicine, Korea University Ansan Hospital, Korea University College of Medicine, 516 Gojan-1-dong, Danwon-gu, Ansan-si, Gyeonggi-do 425-707, Korea;
- Accepted July 17, 2012
- First published July 28, 2012.
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