[1] Birmingham Atlanta Vet Affairs Geriatr Res Educ &, Birmingham, AL USA
[2] Univ Alabama Birmingham, Dept Med, Div Gerontol Geriatr & Palliat Care, Birmingham, AL 35294 USA
[3] Univ Alabama Birmingham, Ctr Aging, Birmingham, AL USA
[4] Univ Alabama Birmingham, Dept Family & Community Med, Birmingham, AL USA
[5] Duke Univ, Sch Nursing, Durham, NC USA
[6] Duke Univ, Ctr Study Aging & Human Dev, Durham, NC USA