- Correspondence to Dr Andrea Venn, Division of Epidemiology and Public Health and UK Centre for Tobacco and Alcohol Studies (UKCTAS), University of Nottingham, Clinical Sciences Building, City Hospital, Nottingham, NG5 1PB, UK; ,
- Received April 30, 2014
- Accepted August 23, 2014
- First published September 26, 2014.
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