[1] Beth Israel Med Ctr, CDI, Edmond de Rothschild Chem Dependency Inst, New York, NY 10003 USA
[2] Natl Dev & Res Inst Inc, New York, NY USA
[3] Univ Alaska, Dept Psychol, Anchorage, AK 99508 USA
[4] Univ Alaska, Intravenous Drug User IVDU Project, Anchorage, AK 99508 USA