- Correspondence to Dr Joanna E Cohen, Institute for Global Tobacco Control, Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, 2213 McElderry St, Fourth Floor Baltimore, MD 21205, USA;
- Received August 23, 2016
- Revised January 16, 2017
- Accepted February 17, 2017
- First published April 17, 2017.
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