[1] Meyers Primary Care Inst, 630 Plantat St, Worcester, MA 01605 USA
[2] Univ Massachusetts, Sch Med, Div Geriatr Med, Worcester, MA USA
[3] Kaiser Permanente Colorado, Inst Hlth Res, Denver, CO USA
[4] Univ Colorado, Sch Med, Dept Family Med, Aurora, CO USA
[5] Univ Maryland, Sch Med, Dept Epidemiol & Publ Hlth, Baltimore, MD 21201 USA
[6] Yale Univ, Sch Med, New Haven, CT USA
[7] Johns Hopkins Univ, Div Geriatr Med, Baltimore, MD USA
[8] Kaiser Permanente Northern Calif, Div Res, Oakland, CA USA
[9] Univ Penn, Sch Nursing, New Courtland Ctr Transit & Hlth, Philadelphia, PA 19104 USA
[10] HealthPartners Inst, Minneapolis, MN USA
[11] Kaiser Permanente Northwest, Ctr Hlth Res, Portland, OR USA
[12] Wake Forest Baptist Med Ctr, Winston Salem, NC USA
[13] Kaiser Washington Hlth Res Inst, Seattle, WA USA
[14] Univ Penn, Sch Nursing, Philadelphia, PA 19104 USA
[15] Univ N Carolina, Gillings Sch Global Publ Hlth, Chapel Hill, NC USA
[16] Palo Alto Med Fdn Res Inst, Palo Alto, CA USA
[17] Univ Washington, Sch Nursing, Seattle, WA 98195 USA
[18] Durham Vet Affairs Med Ctr, Geriatr Res Educ & Clin Ctr, Durham, NC USA