[1] Wake Forest Sch Med, Dept Social Sci & Hlth Policy, Winston Salem, NC 27157 USA
[2] Wake Forest Univ, Dept Commun, Winston Salem, NC 27101 USA
[3] Duke Univ, Dept Populat Hlth Sci, Sch Med, Durham, NC USA
[4] Wake Forest Sch Med, Dept Internal Med, Sect Hematol & Oncol, Winston Salem, NC 27157 USA
[5] Univ Southern Calif, Leonard Davis Sch Gerontol, Los Angeles, CA 90007 USA
[6] Goldsmith Res Grp, Winston Salem, NC USA
[7] MD Anderson Canc Ctr, Dept Pediat, Houston, TX USA
[8] Northwestern Univ, Feinberg Sch Med, Dept Med Social Sci, Chicago, IL 60611 USA