1. Department of Plant Biology and Biotechnology, University of Benin, Benin City, Nigeria
2. Goodnight Family Department of Sustainable Development, Appalachian State University, Boone, NC, USA
3. Department of Environmental Management and Toxicology, Fed. Univ. of Petroleum Resources, Effurun, Nigeria
4. Lancaster Environment Centre, Lancaster University, Lancaster, UK
5. Department of Medical Biochemistry, Kampala International University, Ishaka, Western Uganda