1. MEHEWE Study Group, Obafemi Awolowo University, Ile-Ife 220282, Nigeria
2. Department of Child Dental Health, Obafemi Awolowo University, Ile-Ife 220282, Nigeria
3. The Centre for Reproductive and Population Health Studies, Nigerian Institute of Medical Research, Yaba, Lagos 101212, Nigeria
4. Postgraduate Department, University of Sierra Sur, Oaxaca 70805, Mexico
5. Faculty of Medicine, University of Bergen, 5020 Bergen, Norway
6. Department of Pediatric Dentistry and Dental Public Health, Faculty of Dentistry, Alexandria University, Alexandria 21527, Egypt
7. Provost’s Group, Regent’s University, London E14 2BE, UK
8. Department of Family Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 91803, USA