1. Department of Physiology and Pharmacology, Wake Forest School of Medicine , Winston-Salem, NC , USA
2. Centers for Disease Control and Prevention, Division of Laboratory Sciences, Tobacco and Volatiles Branch , Atlanta, GA , USA
3. Division of Biostatistics, University of Minnesota , Minneapolis, MN , USA
4. Department of Social Sciences and Health Policy, Wake Forest School of Medicine , Winston-Salem, NC , USA
5. Department of Psychiatry and Behavioral Sciences, Duke University , Durham, NC , USA
6. Department of Medicine, University of California, San Francisco , San Francisco, CA , USA
7. Department of Psychiatry and Behavioral Sciences and Masonic Cancer Center, University of Minnesota , Minneapolis, MN , USA
8. Department of Psychiatry and Behavioral Sciences, and Hollings Cancer Center, Medical University of South Carolina , Charleston, SC , USA