- Correspondence to Dr Sabrina L Smiley, Department of Preventive Medicine, Keck School of Medicine, Tobacco Center of Regulatory Science for Vulnerable Populations, Institute for Health Promotion and Disease Prevention Research, University of Southern California, Los Angeles CA 90032, USA;
- Received June 11, 2018
- Revised October 4, 2018
- Accepted October 8, 2018
- First published November 1, 2018.
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