[1] Univ Toronto, Ctr Res Inner City Hlth, St Michaels Hosp, Keenan Res Ctr Li Ka Shing Knowledge Inst,Dept Em, Toronto, ON M5B 1W8, Canada
[2] Univ Toronto, St Michaels Hosp, Emergency Dept, Toronto, ON M5B 1W8, Canada
[3] Univ Toronto, Dept Med, Div Emergency Med, Toronto, ON M5B 1W8, Canada
[4] Univ Toronto, St Michaels Hosp, Suicide Studies Unit, Arthur Sommer Rotenberg Chair Suicide Studies, Toronto, ON M5B 1W8, Canada
[5] Univ Toronto, Fac Med, Dept Psychiat, Toronto, ON M5S 1A1, Canada
[6] Ctr Addict & Mental Hlth, Toronto, ON, Canada
[7] Univ Toronto, Fac Med, Dept Publ Hlth Sci, Toronto, ON M5B 1W8, Canada
[8] Inst Clin Evaluat Sci, Toronto, ON, Canada
[9] Univ Toronto, Dept Family & Community Med, St Michaels Hosp, Toronto, ON M5B 1W8, Canada