1. Department of Community Health, Obafemi Awolowo University, Ile-Ife, Nigeria
2. School of Pharmacy, University of the Western Cape Town, Cape Town 7530, South Africa
3. College of Medicine, University of Lagos, Lagos, Nigeria
4. Department of Public Health, Federal University of Sciences and Technology, Owerri, Nigeria
5. School of Public Health, University of the Western Cape, Cape Town, South Africa
6. Service of Oral and Maxilla-Facial Surgery, Department of Dental Medicine, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
7. National Center Laboratory of Oral Biomedicine Ministry of Research Innovation and Technology, Democratic Republic of the Congo, Kinshasa
8. Department of Health Systems and population Health Sciences, Tilman J. Fertitta Family College of Medicine, University of Houston, Houston, TX, USA