- Correspondence to Dr P Benford, Division of Rehabilitation and Ageing, School of Medicine, University of Nottingham, B Floor, The Medical School, Queen's Medical Centre, Nottingham NG7 2UH, UK;
- Received February 18, 2015
- Revised June 17, 2015
- Accepted July 13, 2015
- First published August 13, 2015.
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