1. Department of Pharmacy, School of Health Sciences, University of Zambia , Lusaka , Zambia
2. Department of Disease Control, School of Veterinary Medicine, University of Zambia , Lusaka , Zambia
3. Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine , London , UK
4. Department of Biological Sciences, School of Natural Sciences, University of Zambia , Lusaka , Zambia
5. Department of Pathology & Microbiology Laboratory, University Teaching Hospitals , Lusaka , Zambia
6. Department of Anatomy and Physiological Sciences, Institute of Basic and Biomedical Sciences, Levy Mwanawasa Medical University , Lusaka , Zambia
7. Department of Veterinary Services, Central Veterinary Research Institute, Ministry of Fisheries and Livestock , Lusaka , Zambia
8. Department of Food Science and Nutrition, School of Agricultural Sciences, University of Zambia , Lusaka , Zambia
9. Department of Medicine, School of Medicine, Eden University , P.O. Box 37727, Lusaka , Zambia
10. Department of Public Health, St Francis University College of Health and Allied Sciences , Ifakara , Tanzania