[1] Georgetown Univ, Med Ctr, Canc Prevent & Control Program, Dept Oncol,Lombardi Comprehens Canc Ctr, Washington, DC 20057 USA
[2] Amer Legacy Fdn, Schroeder Inst Tobacco Res & Policy Studies, Washington, DC USA
[3] WESTAT Corp, Behav Hlth Grp, Rockville, MD 20850 USA
[4] Brown Univ, Warren Alpert Med Sch, Dept Psychiat & Human Behav, Providence, RI 02912 USA
[5] Brown Univ, Ctr Stat Sci, Providence, RI 02912 USA
[6] Albert Einstein Coll Med, Montefiore Med Ctr, Bronx, NY USA
[7] Univ Massachusetts, Dept Psychol, Amherst, MA 01003 USA
[8] MD Anderson Canc Ctr, Dept Hlth Dispar Res, Houston, TX USA
[9] Brown Univ, Miriam Hosp, Warren Alpert Med Sch, Dept Med, Providence, RI 02912 USA