1. Department of Preventive Medicine and Public Health; University of Kansas School of Medicine; Kansas City KS USA
2. Tobacco Research and Treatment Center, Department of Medicine; Massachusetts General Hospital and Harvard Medical School; Boston MA USA
3. Department of Family Medicine and Public Health, and Moores Cancer Center; University of California; San Diego La Jolla CA USA
4. Division of Pulmonary, Allergy, and Critical Care Medicine; University of Alabama at Birmingham; Birmingham AL USA
5. Department of Population Health; New York University School of Medicine; New York NY USA
6. Department of Medicine; VA New York Harbor Healthcare System; New York NY USA
7. Vanderbilt Center for Tobacco, Addictions, and Lifestyle, Department of Medicine; Vanderbilt University Medical Center; Nashville TN USA
8. Department of Psychology and Human Development; Vanderbilt University; Nashville TN USA