1. Lagos University Teaching Hospital; Lagos Nigeria
2. Community Health and Primary Care; University of Lagos; Lagos Nigeria
3. Department of Community Health; University of Lagos; Lagos Nigeria
4. Department of Oral and Maxillofacial Surgery; University of Lagos; Lagos University Teaching Hospital; Lagos Nigeria
5. King's College London Dental Institute; London UK
6. Department of Oral Pathology, Radiology and Medicine; Dows Institute for Dental Research; College of Dentistry; University of Iowa; Iowa City IA USA