- Correspondence to Professor Lelia Duley, Nottingham Clinical Trials Unit, Queen’s Medical Centre, University of Nottingham, Nottingham NG7 2UH, UK;
- Received 21 December 2016
- Revised 19 June 2017
- Accepted 23 June 2017
- Published in print 1 January 2018.
- Published online 13 December 2017.
- Published first 18 September 2017.
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