- Correspondence to Dr Eun-Seok Shin, Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan 44033, South Korea;
- Received November 30, 2015
- Revised March 28, 2016
- Accepted April 20, 2016
- First published May 4, 2016.
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