- Correspondence to Dr Jianxing He, Department of Cardiothoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, 151 YanJiang Road, Guangzhou 510120, China;
- Received January 11, 2016
- Revised April 12, 2016
- Accepted April 24, 2016
- First published May 12, 2016.
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