- Correspondence to Dr P Higgins, College of Medical, Veterinary and Life Sciences, Institute of Cardiovascular & Medical Sciences, University of Glasgow, Gardiner Institute, Western Infirmary, Glasgow G11 6NT, UK;
- Received February 19, 2014
- Revised March 18, 2014
- Accepted March 29, 2014
- First published May 1, 2014.
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