[1] Univ Pittsburgh, Sch Social Work, 2117 Cathedral Learning, Pittsburgh, PA 15260 USA
[2] Univ Pittsburgh, Dept Epidemiol, Ctr Aging & Populat Hlth, Pittsburgh, PA 15261 USA
[3] Boston Coll, Sch Nursing, Chestnut Hill, MA 02167 USA
[4] Grad Sch Publ Hlth, Dept Biostat, Pittsburgh, PA USA
[5] Univ Pittsburgh, Sch Nursing, Dept Hlth & Community Serv, Ctr Res & Evaluat, Pittsburgh, PA 15261 USA
[6] Univ Pittsburgh, Sch Nursing, Dept Hlth & Community Serv, Pittsburgh, PA 15261 USA