[1] Ryerson Univ, Fac Community Serv, Daphne Cockwell Sch Nursing, Toronto, ON, Canada
[2] Womens Coll Hosp, Subst Use Serv Meta PHI, Toronto, ON, Canada
[3] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[4] Unity Hlth Toronto, Li Ka Shing Knowledge Inst, Toronto, ON, Canada
[5] Yale Univ, Sch Nursing, New Haven, CT 06536 USA