1. Department of Biomedical Sciences, Faculty of Science, University of Ngaoundere, Cameroon
2. Department of Physiological Sciences and Biochemistry, FMBS, Garoua, University of Ngaoundere, Cameroon
3. Anatomo-Cytopathology Laboratory, University Hospital Center of Yaounde, Cameroon
4. Department of Biochemistry University of Dschang, Cameroon