- Correspondence to Professor Jill Pell, Henry Mechan Professor of Public Health, Institute of Health & Wellbeing, University of Glasgow, 1 Lilybank Gardens, Glasgow, G12 8RZ, UK;
- Received July 7, 2013
- Revised November 12, 2013
- Accepted November 14, 2013
- First published December 13, 2013.
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