1. Department of Physiology, Faculty of Basic Medical Sciences, College of Health Sciences, Usmanu Danfodiyo University, Sokoto, Nigeria
2. Centre for Advanced Medical Research and Training, Usmanu Danfodiyo University, Sokoto, Nigeria
3. Department of Anatomy and Physiology, Faculty of Medicine, National University of Science and Technology, Bulawayo, Zimbabwe
4. School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa