1. Laboratory of Forest Resources and Wood Valorization, Training Unit in Engineering Sciences, Post Graduate School of Fundamental and Applied Sciences, University of Douala, Douala, Cameroon
2. Laboratory of Biochemistry, Department Biochemistry, Faculty of Science, University of Douala, Douala, Cameroon
3. Laboratory of Animal Biology, Department of Animal Biology, Faculty of Science, University of Douala, Douala, Cameroon