[1] Rochester Inst Technol, Dept Psychol, Rochester, NY 14623 USA
[2] Univ Rochester, Sch Med & Dent, Dept Psychiat, Ctr Study & Prevent Suicide, Rochester, NY 14642 USA
[3] Univ Western Ontario, Schulich Sch Med & Dent, Dept Psychiat, London, ON, Canada
[4] Univ Western Ontario, Schulich Sch Med & Dent, Dept Epidemiol & Biostat, London, ON, Canada