1. Tobacco Control Center, National Cancer Center, Goyang, Korea
2. Department of Cancer Prevention and Detection, National Cancer Center, Goyang, Korea
3. Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea
4. Cancer Early Detection Branch, National Cancer Control Institute, National Cancer Center, Goyang, Korea
5. Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
6. Ontario Institute for Cancer Research, Toronto, Ontario, Canada
7. School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada