1. Dept. of Stomatological Studies, Faculty of Dentistry, University of Limpopo, MEDUNSA 0204, South Africa
2. Dept. of Dental Ecology, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
3. Departments of Oral Biology/Oral Medicine, School of Dentistry, University of Washington, Seattle, WA, USA
4. Dept. of Oral Health, Universidad Autonoma Metropolitana-Xochimilco, Mexico City, Mexico
5. Dept. of Oral Pathology, Ragas Dental College and Hospital, Chennai, India; and