1. Department of Periodontics & Community Dentistry, College of Dentistry, King Saud University, Riyadh, 12372, Saudi Arabia
2. Department of Oral Health Policy & Epidemiology, Harvard School of Dental Medicine, Boston, MA 02215, USA
3. Department of Family & Community Medicine, College of Medicine, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
4. Department Health Policy & Organization, School of Public Health, University of Alabama at Birmingham, Birmingham, AL 35233, USA
5. Department of Family & Community Medicine, Heersink School of Medicine, University of Alabama at Birmingham Birmingham, AL 35205, USA
6. Interdisciplinary Center for Research on AIDS, Yale University, New Haven, CT 06510-2483, USA
7. Department of Restorative Dentistry & Biomaterial Sciences Harvard School of Dental Medicine, Boston, MA 02215, USA
8. Magic City Research Institute, Birmingham AIDS Outreach, Birmingham, AL 35233, USA