Funding for this research was provided by:
Vancouver Coastal Health
Received: 7 March 2018
Accepted: 27 August 2018
First Online: 10 September 2018
Ethics approval and consent to participate
: This study involved the secondary use of anonymous data collected as part of the drug checking service. Participants’ refusal to participate in the study did not influence the services provided to them. The University of British Columbia (UBC) and Providence Health Care ethics committees reviewed and approved the study protocol (UBC-REB NUMBER: H16-02973).
: Not applicable.
: The authors declare that they have no competing interests.
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