1. Departments of Medicine and Pharmacology and Clinical Pharmacy, Ahmadu Bello University, Zaria, Nigeria
2. Department of Veterinary Parasitology and Entomology, Ahmadu Bello University, Zaria, Nigeria
3. Department of Veterinary Pathology and Microbiology, Ahmadu Bello University, Zaria, Nigeria
4. Department of Pathology, Ahmadu Bello University, Zaria, Nigeria