1. Office of the Chair of School, School of Oral Health Sciences. Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
2. Department of Oral Medicine and Periodontology, School of Oral Health Sciences. Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
3. Chair of School of Oral Health Sciences. Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4. Department of Periodontology and Oral Medicine, Sefako Makgatho Health Sciences University, Pretoria, South Africa
5. Department of Periodontics and Oral Medicine, School of Oral Health Sciences, Faculty of Health Sciences. University of Pretoria, Pretoria, South Africa