[1] Brown Univ, Ctr Alcohol & Addict Studies, Providence, RI 02912 USA
[2] Ohio State Univ, Coll Publ Hlth, Columbus, OH 43210 USA
[3] Brown Univ, Dept Psychiat & Human Behav, Providence, RI 02912 USA
[4] Georgetown Univ Med Ctr, Lombardi Comprehens Canc Ctr, Dept Oncol, Washington, DC USA
[5] Harvard Univ, Sch Med, Dept Psychiat, Massachusetts Gen Hosp, Boston, MA 02115 USA
[6] WESTAT Corp, Rockville, MD 20850 USA