1. Department of Oral Pathology, Medicine and Diagnosis, Faculty of Dentistry, College of Medical Sciences, University of Calabar, Calabar, Nigeria
2. Department of Oral and Maxillofacial Pathology and Medicine, University of Benin, Benin City, Edo State, Nigeria
3. Department of Internal Medicine, University of Benin, Benin City, Edo State, Nigeria
4. Department of Chemical Pathology, University of Benin, Benin City, Edo State, Nigeria