1. Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
2. Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
3. Department of Biochemistry, Faculty of Applied and Natural Sciences, Enugu State University of Science and Technology, Enugu, Nigeria
4. Department of Biological Sciences, Wayne State University, Detroit, MI, USA