1. Department of Family and Preventive Medicine and TSET Health Promotion Research Center, University of Oklahoma Health Sciences Center , 655 Research Parkway, Suite 400, Oklahoma City, OK , USA
2. Health Sciences Research Institute and Nicotine & Cannabis Policy Center, University of California , Merced, Merced, CA , USA
3. Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
4. Cancer Prevention Program, Public Health Sciences Division, Fred Hutchinson Cancer Center , Seattle, WA , USA
5. Annenberg School for Communication, University of Pennsylvania , Philadelphia, PA , USA
6. Health Sciences Library and Information Management, Graduate College, Robert M. Bird Health Sciences Library, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
7. Freedom Oklahoma , Oklahoma City, OK , USA