1. Medical Research Council, London School of Hygiene and Tropical Medicine, Banjul 220, The Gambia
2. Medical Biochemistry Department, College of Medicine, Alex-Ekwueme Federal University Ndufu-Alike, P.M.B. 1010, Ikwo 482131, Nigeria
3. Protein Structure-Function and Research Unit, School of Molecular and Cell Biology, Faculty of Science, University of the Witwatersrand, Braamfontein, Johannesburg 2050, South Africa
4. Anatomy Department, College of Medicine, Alex-Ekwueme Federal University Ndufu-Alike, P.M.B. 1010, Ikwo 482131, Nigeria
5. World Health Organization, United Nations House Plot 617/618 Central Area District, P.M.B. 2861, Abuja 900211, Nigeria
6. Society for Family Health, 20 Omotayo Ojo Street, Allen, Ikeja 100246, Nigeria
7. UNICEF Sokoto Field Office, 2 Rahamaniyya Street, Off Sama Road, Sokoto 840224, Nigeria
8. Department of Medical Biochemistry, David Umahi Federal University of Health Sciences, Uburu 491105, Nigeria