1. Center for Tobacco Control Research and Education, University of California , San Francisco , CA , USA
2. Institute for Health & Aging, School of Nursing, University of California , San Francisco , CA , USA
3. Department of Population Health, Grossman School of Medicine, New York University , New York , NY , USA
4. Department of Psychology, University of Waterloo , Waterloo, ON , Canada
5. National Tobacco Control Office, Chinese Center for Disease Control and Prevention , Beijing , China
6. School of Public Health Sciences, University of Waterloo , Waterloo, ON , Canada
7. Ontario Institute for Cancer Research , Toronto, ON , Canada