- Correspondence to Dr Beverly P Bergman, Institute of Health and Wellbeing, Public Health and Health Policy, 1 Lilybank Gardens, Glasgow G12 8RZ, UK;
- Received 18 December 2015
- Revision received 22 January 2016
- Accepted 17 February 2016
- Published in print 1 February 2017.
- Published online 27 January 2017.
- Published first 22 March 2016.
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