[1] NIDA, Bethesda, MD 20892 USA
[2] Univ Penn, Sch Med, Philadelphia, PA 19104 USA
[3] Washington Univ, Sch Med, Dept Psychiat, St Louis, MO 63110 USA
[4] Univ Colorado, Sch Med, Div Subst Dependence, Dept Psychiat, Denver, CO 80262 USA
[5] Yale Univ, Sch Med, VACHS, West Haven, CT 06516 USA
[6] Yale Univ, Sch Med, Dept Psychiat, Div Human Genet,VA Med Ctr 116A2, West Haven, CT 06516 USA
[7] Univ Colorado, Inst Behav Genet, Boulder, CO 80309 USA
[8] Rockefeller Univ, Lab Biol Addict Dis, New York, NY 10021 USA
[9] Albert Einstein Coll Med, Dept Psychiat & Med, Bronx, NY 10461 USA
[10] Univ Utah, Eccles Inst Human Genet, Dept Human Genet, Salt Lake City, UT 84108 USA
[11] Univ Texas, Hlth Sci Ctr, Dept Psychiat, Program Genom & Bioinformat Drug Addict, San Antonio, TX 78229 USA
[12] Univ Michigan, Dept Psychiat, Ann Arbor, MI 48109 USA
[13] SRI Int, Ctr Hlth Sci, Menlo Pk, CA 94025 USA
[14] Rutgers State Univ, Dept Genet, Nelson Biol labs, Piscataway, NJ 08854 USA
[15] Univ Calif San Diego, Dept Psychiat, La Jolla, CA 92093 USA
[16] Johns Hopkins Univ, Sch Med, Baltimore, MD 21224 USA
[17] Univ Pittsburgh, Pittsburgh, PA 15261 USA
[18] NCI, Div Canc Control & Populat Sci, Rockville, MD 20852 USA