title: A comparison of drug use networks across three cities.
authors: NOVA Research Company, Bethesda, MD 20814, USA.
authors: M L
authors: ML
authors: Williams
authors: Z
authors: Z
authors: Zhuo
authors: H A
authors: HA
authors: Siegal
authors: R R
authors: RR
authors: Robles
authors: R T
authors: RT
authors: Trotter
authors: A
authors: A
authors: Jones
mesh_terms: D000328:Adult; D005163:Factor Analysis, Statistical; D005260:Female; D015658:HIV Infections / Q000453:epidemiology / Q000523:psychology* / Q000635:transmission; D006801:Humans; D008297:Male; D008875:Middle Aged; D009820:Ohio / Q000453:epidemiology; D011647:Puerto Rico / Q000453:epidemiology; D012309:Risk-Taking; D012725:Sexual Behavior; D012931:Social Environment; D015819:Substance Abuse, Intravenous / Q000453:epidemiology / Q000523:psychology*; D013781:Texas / Q000453:epidemiology