- Correspondence to Dr Shelley D Golden, Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, 364 Rosenau Hall, CB7440, Chapel Hill, NC 27599, USA;
- Received June 3, 2016
- Revised July 8, 2016
- Accepted July 12, 2016
- First published October 3, 2016.
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