1. Department of Optometry, Faculty of Life Sciences, University of Benin, Benin City 300283, Nigeria
2. Bathurst Rural Clinical School (BRCS), School of Medicine, Western Sydney University, Bathurst, NSW 2795, Australia
3. Westville Campus, African Vision Research Institute, Discipline of Optometry, University of KwaZulu-Natal, Durban 3629, South Africa
4. Department of Community Medicine, College of Health Sciences, University of Jos, Jos 930003, Nigeria
5. Department of Optometry, Centre for Health Sciences, University of the Highlands and Islands, Inverness IV2 3JH, UK
6. Department of Optometry and Vision Science, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast 00233, Ghana
7. Department of Optometry, Faculty of Health Sciences, Mzuzu University, Luwinga 2, Mzuzu P. Bag 201, Malawi
8. Department of Public Health, Faculty of Allied Medical Sciences, College of Medical Sciences, University of Calabar, Calabar 540271, Nigeria
9. Health Division, University of Bamenda, Bambili P.O. Box 39, Cameroon
10. School of Management and Marketing, Curtin Business School, Curtin University, Bentley, WA 6151, Australia
11. Department of Psychiatry, College of Health Sciences, University of Jos, Jos 930001, Nigeria
12. Tanzania Food and Nutrition Center, Dar es Salaam P.O. Box 977, Tanzania
13. Department of Computer Science, University of Jos, Jos 930003, Nigeria
14. School of Health Science, Western Sydney University, Campbelltown, NSW 2560, Australia