1. Department of Anatomy and Cell Biology, Obafemi Awolowo University, Ile-Ife, Nigeria
2. Centre for Scientific Investigations and Training, Owerri, Imo State, Nigeria
3. School of Nursing, College of Health and Human Services, University of North Carolina at Charlotte, USA
4. Bucks New University, Alexandra Road, High Wycombe, UK
5. Health Centre, University of Medical Sciences, Ondo City, Ondo State, Nigeria
6. Military Hospital, 82 Division, Enugu, Enugu State, Nigeria
7. Edo State University, Iyamho, Edo State, Nigeria
8. Department of Anatomy and Neurobiology, Imo State University, Owerri, Nigeria
9. Mother Theresa Hospital, Aba, Abia State, Nigeria
10. Liviashammah Hospitals Ltd., 5 Shammah Close, Abuja-Keffi Road, Maraba, Nasarawa State, Nigeria