1. Research Unit of Microbiology and Antimicrobial Substances, Department of Biochemistry, Faculty of Science University of Dschang Dschang Cameroon
2. Research Unit of Biochemistry of Medicinal Plants, Food Science and Nutrition, Department of Biochemistry, Faculty of Science University of Dschang Dschang Cameroon
3. Laboratory of Biochemistry, Department of Biochemistry and Physiological Science, Faculty of Medicine and Biomedical Science University of Yaounde I Yaounde Cameroon
4. Laboratory for Public Health Research Biotechnology, Department of Biochemistry University of Yaounde I Yaounde Cameroon
5. Department of Neurology University Hospital of Würzburg Würzburg Germany
6. Centre International de Recherche Chantal Biya Yaounde Cameroon