[1] NYU, Coll Dent, Dept Epidemiol & Hlth Promot, 380 Second Ave, New York, NY 10010 USA
[2] NYU, Coll Dent, WHO Collaborating Ctr Qual Improvement & Evidence, New York, NY USA
[3] Stellenbosch Univ, Stellenbosch Inst Adv Studies, Stellenbosch, South Africa
[4] Univ Maryland, Equ Divers & Inclus, Sch Dent, Baltimore, MD USA