[1] Univ N Carolina, Sch Med, Div Geriatr Med, 5003 Old Clin CB 7550, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Ctr Aging & Hlth, Sch Med, Old Clin 5003 CB 7550, Chapel Hill, NC 27599 USA
[3] Univ N Carolina, Eshelman Sch Pharm, Div Pharmaceut Outcomes & Policy, Chapel Hill, NC 27599 USA
[4] Vet Affairs VA Pittsburgh Healthcare Syst, Ctr Hlth Equ Res & Promot, Pittsburgh, PA 15240 USA
[5] Univ N Carolina, Eshelman Sch Pharm, Div Practice Adv & Clin Educ, Chapel Hill, NC USA
[6] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Epidemiol, Chapel Hill, NC USA