[1] UCL, Dept Epidemiol & Publ Hlth, 1-19 Torrington Pl, London WC1E 6BT, England
[2] Univ Dublin, Dublin Dent Univ Hosp, Trinity Coll Dublin, Div Child & Publ Dent Hlth, Dublin, Ireland
[3] McGill Univ, Fac Dent, Montreal, PQ, Canada
[4] Univ Glasgow, Dept Dent Publ Hlth, Sch Med Dent & Nursing, Glasgow, Lanark, Scotland
[5] Radboud Univ Nijmegen, Med Ctr, Dept Dent Qual & Safety Oral Healthcare, Nijmegen, Netherlands
[6] Heidelberg Univ, Med Fac, Sect Translat Hlth Econ, Heidelberg, Germany
[7] Univ Pittsburgh, Dept Dent Publ Hlth, Pittsburgh, PA USA
[8] Publ Hlth Fdn India, Inst Area Gurgaon, Haryana, India
[9] Univ Nacl Colombia, Fac Odontol, Dept Salud Colect, Bogota, Colombia
[10] Fed Univ Rio Grande, Dept Prevent & Social Dent, Porto Alegre, RS, Brazil
[11] Griffith Univ, Sch Dent & Oral Hlth, Menzies Hlth Inst Queensland, Gold Coast, Australia
[12] Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, Dept Prevent & Restorat Dent Sci, San Francisco, CA 94143 USA
[13] NYU, Coll Global Publ Hlth, WHO Collaborating Ctr Evidence Based Dent & Qual, New York, NY USA
[14] NYU, Coll Dent, New York, NY USA