1. Department of Oral surgery, Maxillofacial Surgery and Periodontology, Faculty of Medicine and Biomedical Sciences, University of Yaounde, Cameroon
2. Laboratory of Implantology and Periodontology, University of Yaounde I, Cameroon
3. Department of Gynaecology and Obstetrics, Faculty of Medicine and Biomedical Sciences, University of Yaounde, Cameroon
4. Faculty of Medicine and Pharmaceutical Sciences, The University of Douala, Cameroon
5. Department of Biochemistry, Faculty of Medicine and Biomedical Sciences, University of Yaounde, Cameroon