- Correspondence to Professor Mike Clarke, All-Ireland Hub for Trials Methodology Research, Centre for Public Health, Queens University Belfast, Institute of Clinical Sciences, Block B, Royal Hospitals, Grosvenor Road, Belfast BT12 6BJ, UK;
- Received December 14, 2012
- Revised February 12, 2013
- Accepted February 13, 2013
- First published March 1, 2013.
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