This study was a survey of drug users who obtain buprenorphine from the black market and have used buprenorphine during the last month. Subjects were surveyed at various locations (streets, railway stations, etc.) with a few simple questions in order to describe the use of buprenorphine in this "out of care" population.
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The objective of this survey is to describe quantitatively and qualitatively, the use of buprenorphine in the population who obtain buprenorphine only on black market or both on black market and in pharmacy.
Timeframe: Not Applicable, cross-sectional description.