- Correspondence to Professor Tristan D Yan, The Systematic Review Unit, The Collaborative Research Group (CORE), Sydney, Australia; Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, the University of Sydney, Sydney, NSW 2050, Australia;
- Received April 2, 2013
- Revised June 6, 2013
- Accepted June 11, 2013
- First published June 27, 2013.
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