1. Department of Environmental Management, Bayero University, Dutse, Nigeria
2. Department of Internal Medicine, Federal University, Dutse, Nigeria
3. Department of Nursing Science, Hemodialysis Unit, Aminu Kano Teaching Hospital, Maradi, Niger Republic
4. Department of Public Health, Maryam Abacha American University of Niger, Maradi, Niger Republic
5. Department of Community Medicine, Bayero University/Aminu Kano, Kano, Nigeria
6. Department of Chemical Pathology and Immunology, Bayero University/Aminu Kano, Kano, Nigeria
7. Department of Public Health, Texila American University, Georgetown, Guyana, USA
8. Department of Family and Community Medicine, College of Medicine, University of Bisha, KSA