1. Department of Oral and Maxillofacial Surgery, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria
2. Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
3. Department of Natural and Environmental Sciences, American University of Nigeria, Yola, Nigeria
4. School of Health, University of Sunshine Coast, Sippy Downs, Australia
5. Infectious and Tropical Diseases Unit, Department of Medicine, Bayero University, Aminu Kano Teaching Hospital, Kano, Nigeria
6. Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory 0810, Australia