1. University of Jos, Department of Community Medicine , Jos , Nigeria
2. Sightsavers Nigeria Country Office ,1 Golf Course Road, P.O. Box 503, Kaduna, Nigeria
3. Liverpool School of Tropical Medicine, Department of International Public Health , Liverpool , UK
4. Department of Psychiatry Ahmadu Bello University , Zaria, Kaduna State , Nigeria
5. Department of Economics, Ahmadu Bello University Business School, Ahmadu Bello University , Zaria , Nigeria
6. Ahmadu Bello University Distance Learning Centre, Ahmadu Bello University , Zaria , Nigeria
7. Ministry of Health Neglected Tropical Disease Control Unit , Kaduna , Nigeria
8. Neglected Tropical Disease Unit, Department of Public Health, Ogun State Ministry of Health, Ogun State, Nigeria, Federal Ministry of Health , Nigeria