- Correspondence to Professor Stephen Peckham, Centre for Health Services Studies, University of Kent, Canterbury, Kent CT2 7NF, UK;
- Received 18 September 2014
- Revised 16 January 2015
- Accepted 18 January 2015
- Published in print 1 July 2015.
- Published online 10 June 2015.
- Published first 24 February 2015.
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