[1] Univ Maryland, Sch Med, Dept Med, Baltimore, MD 21201 USA
[2] Univ Maryland, Sch Med, Dept Psychiat, Baltimore, MD 21201 USA
[3] Univ Maryland, Sch Med, Dept Epidemiol & Publ Hlth, Baltimore, MD 21201 USA
[4] Univ Maryland, Sch Med, Dept Emergency Med, Baltimore, MD 21201 USA