- Correspondence to Professor Kwang Soo Cha, Department of Cardiology and Medical Research Institute, Pusan National University Hospital, 1-10 Ami-dong Seo-gu, Busan 602-739, Republic of Korea;
- Received December 2, 2014
- Revised March 4, 2015
- Accepted March 18, 2015
- First published April 8, 2015.
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