1. Department of Mathematical Sciences, Abubakar Tafawa Balewa University, Bauchi, Nigeria
2. School of Science and Technology, The Federal Polytechnic Bauchi, Bauchi, Nigeria
3. Department of Mathematical Sciences, Bauchi State University, Gadau, Bauchi, Nigeria
4. Department of Obstetrics Gynaecology, ATBU, Teaching Hospital, Bauchi, Nigeria
5. Department of Medical Biochemistry, ATBU, Teaching Hospital, Bauchi, Nigeria