1. Center for Tobacco Control Research and Education, University of California, San Francisco, CA
2. Global Cancer Program, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA
3. School of Community Health Sciences, University of Nevada, Reno, NV
4. Social and Behavioral Sciences Department, School of Nursing, University of California, San Francisco, CA
5. Department of Medicine, Philip R Lee Institute for Health Policy Studies, University of California, San Francisco, CA