1. Department of Health Behavior Roswell Park Comprehensive Cancer Center Buffalo NY USA
2. School of Public Health Sciences University of Waterloo Waterloo ON Canada
3. Department of Psychology University of Waterloo Waterloo ON Canada
4. Department of Addictions, Institute of Psychiatry, Psychology and Neuroscience King's College London London UK
5. Melbourne Centre for Behaviour Change, School of Psychological Sciences University of Melbourne Parkville Australia
6. Department of Psychiatry and Behavioral Sciences Medical University of South Carolina Charleston SC USA
7. Ontario Institute for Cancer Research Toronto ON Canada