[1] NYU, Coll Dent, Dept Epidemiol & Hlth Promot, New York, NY 10003 USA
[2] Univ S Florida, Coll Med, H Lee Moffitt Canc Ctr & Res Inst, Off Inst Divers, Tampa, FL 33612 USA
[3] Boston Univ, Sch Med, Healthcare Dispar Res Unit, Gen Internal Med Sect, Boston, MA 02118 USA
[4] VA Boston Healthcare Syst, Dept Vet Affairs Hlth Serv, Res & Dev Serv, Boston, MA USA
[5] Duke Univ, Terry Sanford Inst Publ Policy, Durham, NC USA
[6] Duke Univ, Dept Community & Family Med, Durham, NC USA
[7] Univ Maryland, Dept Publ & Community Hlth, Sch Publ Hlth, College Pk, MD 20742 USA
[8] Univ Puerto Rico, Dept Community Dent, Sch Dent, San Juan, PR 00936 USA