- Correspondence to Dr Seok-Min Kang, Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea;
- Received March 15, 2013
- Revised March 30, 2013
- Accepted April 16, 2013
- First published May 22, 2013.
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