1. Department of Biochemistry, Faculty of Science, University of Bamenda, Bambili, Cameroon
2. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada, Spain
3. Department of Biochemistry and Molecular Biology, Faculty of Science, University of Buea, Buea, Cameroon
4. High Technical Teacher Training School, University of Bamenda, Bambili, Cameroon
5. Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon