1. Toxicology and Safety Unit, Department of Environmental Health Sciences, Faculty of Public Health, College of Medicine , University of Ibadan , Ibadan , Nigeria
2. Department of Biochemistry, Faculty of Basic Medical Sciences, College of Pure and Applied Sciences , Kwara State University , Malete, P.M.B 1530 , Nigeria , Fax: +234-08064156056
3. Department of Biochemistry, Faculty of Basic Medical Sciences, College of Pure and Applied Sciences , Kwara State University , Malete , Nigeria
4. Phytochemical Research Laboratory , Department of Industrial Pharmacy , Federal University of Santa Maria , Santa Maria , Brazil