1. Research Unit of Microbiology and Antimicrobial Substances, Faculty of Science, University of Dschang, Dschang, Cameroon
2. Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
3. Department of Basic Scientific Studies, University Institute of Technology, University of Ngaoundere, Ngaoundere, Cameroon
4. Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
5. Department of Biomedical Sciences, University of Ngaoundere, Ngaoundere, Cameroon
6. Department of Chemistry, Faculty of Physical Sciences, University of Ilorin, Ilorin, Nigeria