[1] Friends Res Inst Inc, Pacific Reg Node, Los Angeles, CA 90025 USA
[2] NIDA, Natl Drug Abuse Treatment Clin Trials Network, Lexington, KY USA
[3] Univ Calif Los Angeles, Integrated Subst Abuse Programs, Pacific Reg Node, Los Angeles, CA USA
[4] Aegis Med Syst Inc, Pacific Reg Node, Oxnard, CA USA
[5] Oregon Hlth & Sci Univ, Sch Med, Oregon Node, Portland, OR 97201 USA
[6] NYU, Sch Med, New York Node, New York, NY USA
[7] Addict Res & Treatment Corp, New York Node, Brooklyn, NY USA
[8] Treatment Res Inst, Delaware Valley Node, Philadelphia, PA USA
[9] Robert Wood Johnson Med Sch, Delaware Valley Node, Piscataway, NJ USA
[10] Mercer Trenton Addict Sci Ctr, Delaware Valley Node, Trenton, NJ USA
[11] Wayne State Univ, Sch Med, Great Lakes Reg Node, Detroit, MI USA
[12] Univ Cincinnati, Ohio Valley Node, Cincinnati, OH USA
[13] Maryhaven, Ohio Valley Node, Columbus, OH USA
[14] Midtown Community Mental Hlth Ctr, Ohio Valley Node, Indianapolis, IN USA
[15] Univ Miami, Ctr Studies Family, Florida Node, Miami, FL 33152 USA
[16] Operat PAR Inc, Florida Node, St Petersburg, FL USA
[17] Phoenix House, Long Isl Reg Node, New York, NY USA