1. Department of Pharmacology, Faculty of Basic Medical Sciences, PAMO University of Medical Sciences, Port-Harcourt, Nigeria
2. Department of Pharmacology and Therapeutics, College of Medicine, University of Nigeria, Nsuka, Nigeria
3. Department of Pharmacology and Toxicology, Faculty of Pharmacy, Delta State University, Abraka, Nigeria
4. Neurophysiology Unit, Department of Physiology, Faculty of Basic Medical Sciences, PAMO University of Medical Sciences, Port-Harcourt, Nigeria