[1] NCI, Tobacco Control Res Branch, Div Canc Control & Populat Sci, NIH, Bethesda, MD 20892 USA
[2] Penn State Univ, Dept Behav Hlth, State Coll, PA USA
[3] NCI, Risk Factor Monitoring & Methods Branch, Div Canc Control & Populat Sci, NIH, Bethesda, MD 20892 USA
[4] Robert Wood Johnson Fdn, Princeton, NJ 08540 USA
[5] Ctr Dis Control & Prevent, Off Smoking & Hlth, Natl Ctr Chron Dis Prevent, Atlanta, GA USA
[6] Hlth Evaluat & Learning Profess, Washington, DC USA
[7] State Rhode Isl Dept Hlth, Div Dis Prevent & Control, Providence, RI USA
[8] MasiMax Resources Inc, Rockville, MD USA