[1] Univ Alberta, Dept Emergency Med, Edmonton, AB, Canada
[2] Royal Alexandra Hosp, Dept Emergency Med, Edmonton, AB, Canada
[3] Univ Alberta, Neurosci & Mental Hlth Inst, Edmonton, AB, Canada
[4] Alberta Hlth Serv, Edmonton, AB, Canada
[5] Univ Alberta, Dept Psychiat, Edmonton, AB, Canada
[6] Misericordia Community Hosp, Dept Psychiat, Edmonton, AB, Canada
[7] Univ Terrace, Dept Emergency Med, Room 740,8303 112 St NW, Edmonton, AB T6G 2T4, Canada