[1] Univ Penn, Philadelphia, PA USA
[2] Univ Maryland, Sch Nursing, Baltimore, MD USA
[3] Univ Calif Berkeley, Coll Environm Design, Berkeley, CA USA
[4] Univ Penn, Div Geriatr Med, Perelman Sch Med, Philadelphia, PA USA
[5] Corporal Michael J Crescenz VA Med Ctr, Geriatr & Extended Care Program, Philadelphia, PA USA
[6] Corporal Michael J Crescenz VA Med Ctr, Ctr Hlth Equ Res & Promot, Philadelphia, PA USA
[7] Univ Penn, Leonard Davis Inst Hlth Econ, Philadelphia, PA USA
[8] Univ Penn, Ralston House,3615 Chestnut St, Philadelphia, PA 19104 USA