1. Department of Internal Medicine, University of California , Davis, Sacramento, CA , USA
2. The Herbert Wertheim School of Public Health and Human Longevity Science, University of California , San Diego, La Jolla, CA , USA
3. Moores Cancer Center, University of California , San Diego, La Jolla, CA , USA
4. Department of Medicine, University of California , Irvine, Irvine, CA , USA
5. Department of Medicine, University of California , Los Angeles, Los Angeles, CA , USA
6. Department of Psychiatry and Biobehavioral Sciences, University of California , Los Angeles, Los Angeles, CA , USA
7. Department of Medicine, University of California , San Diego, La Jolla, CA , USA
8. Department of Medicine, University of California , San Francisco, San Francisco, CA , USA
9. Smoking Cessation Leadership Center, University of California , San Francisco, San Francisco, CA , USA
10. School of Nursing, University of California , Los Angeles, Los Angeles, CA , USA