Multi-city study on drug injecting and risk of HIV infection : a report prepared on behalf of the WHO International Collaborative Group. 

 - 231p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Substance abuse, Intravenous--Comparative study<br/>HIV infections--Transmission, epidemiology<br/>Acquired immunodeficiency syndrome--Transmission, epidemiology<br/>Behavior therapy<br/>Substance abuse--Complications, prevention and control<br/>United Kingdom<br/>Canada
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Greece<br/>Thailand<br/>Germany<br/>Spain<br/>Italy<br/>United States<br/>Brazil<br/>Australia