"The present study demonstrates that the opening of the Vancouver SIF was associated with a greater than 30% increase in the rate of detoxification service use among SIF users in comparison to the year prior to the SIF's opening. Subsequent analyses demonstrated that detoxification service use was associated with increased use of methadone and other forms of addiction treatment, as well as reduced injecting at the SIF."

Source

Wood, Evan, Tyndall, Mark W., Zhang, Ruth, Montaner, Julio S.G., and Kerr, Thomas, "Rate of Detoxification Service Use and its Impact among a Cohort of Supervised Injecting Facility Users," Addiction (2007), Vol. 102, p. 918.