1. Rutgers Center for Tobacco Studies, Rutgers Biomedical and Health Sciences, New Brunswick, New Jersey
2. Department of Health Behavior, Society and Policy, Rutgers School of Public Health, Piscataway, New Jersey
3. Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, New Jersey
4. Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey