Institution: | The Department of Medicine, Pharmacology and Toxicology, Faculty of Veterinary Science, University of Khartoum, PO Box 32 Khartoum North, Sudan,;The Department of Biomedical Science, Faculty of Biomedical and Health Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Darul Ehsan, Malaysia,;Correspondence: Department of Biomedical Sciences, Faculty of Biomedical and Health Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor Darul Ehsan, Malaysia |