[1] Univ Calif San Diego, Canc Prevent Program, Moores Canc Ctr, San Diego, CA 92103 USA
[2] Univ Calif San Diego, Dept Family Med & Publ Hlth, San Diego, CA USA
[3] Geisel Sch Med Dartmouth, C Everett Koop Inst, Norris Cotton Canc Ctr, Hanover, NH 03755 USA
[4] US FDA, Ctr Tobacco Prod, Silver Spring, MD USA
[5] NIH, Div Epidemiol Serv & Prevent Res, NIDA, Bethesda, MD USA
[6] Kelly Govt Solut, Rockville, MD 20770 USA
[7] WESTAT Corp, Rockville, MD 20850 USA
[8] Georgetown Univ, Dept Oncol Canc Prevent & Control Program, Lombardi Comprehens Canc Ctr, Washington, DC 20523 USA
[9] NIH, Div Intramural Res, Natl Inst Minor Hlth & Hlth Dispar, Bldg 10, Bethesda, MD 20892 USA
[10] Roswell Pk Canc Inst, Dept Hlth Behav, Buffalo, NY 14263 USA
[11] Schroeder Inst Tobacco Res & Policy Studies Truth, Washington, DC 20001 USA
[12] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Hlth Behav & Soc, Baltimore, MD 21218 USA
[13] NIH, Tobacco Control Res Branch Behav Res Program, Div Canc Control & Populat Sci, Natl Canc Inst, Rockville, MD 20892 USA