- Correspondence to Dr Clive Seale, Centre for Health Sciences, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, 2, Newark Street, London E1 2AT, UK;
- Received February 23, 2010
- Revised May 10, 2010
- Accepted May 17, 2010
- First published August 25, 2010.
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