1. School of Public Health Sciences, Faculty of Health, University of Waterloo , Waterloo, ON , Canada
2. National Addiction Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London , London , UK
3. School of Public Health, Rutgers, The State University of New Jersey , Piscataway , NJ , USA
4. Arnold School of Public Health, University of South Carolina , Columbia, SC , USA
5. Department of Behavioural Science and Health, Institute of Epidemiology and Health Care, University College London , London , UK
6. Department of Statistics and Actuarial Science, University of Waterloo , ON , Canada
7. Department of Health Behavior, Roswell Park Comprehensive Cancer Center , Buffalo, NY , USA
8. Cancer Prevention and Control, Lombardi Comprehensive Cancer Center, Georgetown University , Washington, DC , USA