[1] Shahid Beheshti Univ Med Sci, Sch Dent, Dept Community Oral Hlth, Tehran, Iran
[2] Shahid Beheshti Univ Med Sci, Educ Dev Ctr, Tehran, Iran
[3] Shahid Beheshti Univ Med Sci, Res Inst Dent Sci, Prevent Dent Res Ctr, Tehran, Iran
[4] Australian Natl Univ, Ctr Hlth Stewardship, Canberra, ACT, Australia
[5] World Hlth Org, Reg Off Eastern Mediterranean, Cairo, Egypt