1. Sightsavers , Golf Course Road, P.O. Box 503, Kaduna, Nigeria
2. Federal Ministry of Health , Abuja, FCT, Nigeria, P.M.B. 083, Garki Abuja, Nigeria
3. Sightsavers , 35 Perrymount Road, Haywards Heath, RH16 3BZ, UK
4. Sightsavers, Derriere Laboratoire Meka , Bastos, Yaoundé, BP 4484, Cameroon
5. Kaduna State Ministry of Health , P.O. Box 3547, Kaduna, Nigeria
6. Kebbi State Ministry of Health , Birnin Kebbi, Nigeria
7. Zamfara State Ministry of Health , Gusau, Nigeria
8. University of Jos , P.M.B. 2084, 930001, Plateau, Nigeria
9. Imo State University , P.M.B. 2000, Owerri, Nigeria