[1] Univ N Carolina, Dept Family Med, Sch Med, 590 Manning Dr, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Cecil G Sheps Ctr Hlth Serv Res, Chapel Hill, NC 27515 USA
[3] Univ N Carolina, Sch Med, Div Geriatr Med, Chapel Hill, NC 27515 USA
[4] Univ N Carolina, Sch Med, Palliat Care Program, Chapel Hill, NC 27515 USA
[5] Univ N Carolina, Sch Nursing, Chapel Hill, NC 27515 USA
[6] Univ N Carolina, Sch Social Work, Chapel Hill, NC 27515 USA