- Correspondence to Dr Alastair John Webb, Stroke Prevention Research Unit, Department of Clinical Neurosciences, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK;
- Received November 7, 2012
- Revised December 7, 2012
- Accepted December 27, 2012
- First published February 5, 2013.
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