Primary Outcome Measures:
- 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. [ Time Frame: Not Applicable, cross-sectional description. ]
Secondary Outcome Measures:
- This survey will provide data on patients in regards to their own experience in drug addiction. [ Time Frame: Not Applicable, cross-sectional description. ]
Participants were found from various places and using a "snow ball" technique.