[1] Univ Pittsburgh, Sch Med, Dept Psychiat, Pittsburgh, PA 15260 USA
[2] Univ Pittsburgh, Sch Med, Ctr Social & Urban Res, Pittsburgh, PA 15260 USA
[3] Univ Pittsburgh, Sch Med, Intervent Res Ctr Late Life Mood Disorders, Pittsburgh, PA 15260 USA
[4] Univ Pittsburgh, Sch Med, Bipolar Disorder Ctr Penn, Pittsburgh, PA 15260 USA