[1] Western Psychiat Inst & Clin, Adv Ctr Intervent, Pittsburgh, PA 15213 USA
[2] Western Psychiat Inst & Clin, Serv Res Late Life Mood Disorders, Pittsburgh, PA 15213 USA
[3] Western Psychiat Inst & Clin, John A Hartford Ctr Excellence Geriatr Psychiat, Pittsburgh, PA 15213 USA
[4] Univ Toronto, Fac Med, Div Geriatr Psychol, Rotman Res Inst,Baycrest Ctr Geriatr Care, Toronto, ON, Canada
[5] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, Pittsburgh, PA 15261 USA