1Department of Surgery, Faculty of Veterinary Medicine, University of Benin, Benin City, Nigeria.
2Department of Biochemistry, Faculty of Basic Medical Sciences, University of Calabar, P.M.B. 1115, Calabar, Nigeria.
3Department of Veterinary Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Abuja, P.M.B. 117 Abuja, Nigeria.