1. Faculty of Pharmaceutical Sciences University of Ilorin Ilorin Nigeria
2. Faculty of Pharmaceutical Sciences University of Port Harcourt Choba Nigeria
3. Faculty of Pharmacy University of Ibadan Ibadan Nigeria
4. Department of Public Health University of Calabar Calabar Nigeria
5. Faculty of Pharmacy University of Benin Benin City Nigeria
6. Department of Global Health and Development London School of Hygiene and Tropical Medicine London UK