1. World Bank Africa Centre of Excellence in Oilfield Chemicals Research (ACE-CEFOR), University of Port Harcourt, Choba, Nigeria
2. African Centre of Excellence for Public Health and Toxicological Research (ACE-PUTOR), University of Port Harcourt, Choba, Nigeria
3. Department of Anatomy, Faculty of Basic Medical Sciences, College of Health Sciences, University of Port Harcourt, Chobaa, Nigeria
4. Faculty of Medicine, Institute of Anatomy, University of Belgrade, Belgrade, Serbia
5. Provictoire Research Institute, River State, Nigeria