1. Mother and Child Center of the Chantal Biya Foundation of Yaounde, Faculty of Medicine and Biomedical Sciences of the University of Yaounde I, Yaounde, Cameroon, Phone: +237 677594797
2. District Hospital of Nylon, Douala, Faculty of Medicine and Pharmaceutical Sciences of the University of Douala, Douala, Cameroon
3. Central Hospital of Yaounde, Faculty of Medicine and Pharmaceutical Sciences of the University of Douala, Douala, Cameroon
4. Hospices civils de Lyon, Hôpital Femme Mère Enfant, Chirurgie Pédiatrique, Lyon, France
5. Hospices Civils de Lyon, GH Est, Centre de Biologie et Pathologie, Lyon, France
6. Department of Genetics, University Hospital of Geneva, Geneva, Switzerland
7. Gyneco-Obstetric Hospital of Yaounde, Faculty of Medicine and Biomedical Sciences of the University of Yaounde I, Yaounde, Cameroon
8. Central Hospital of Yaounde, Faculty of medicine and biomedical sciences of the University of Yaounde I, Yaounde, Cameroon
9. Mother and Child Center of the Chantal Biya Foundation Yaounde, Faculty of Medicine and Biomedical Sciences, Department of Paediatrics, Yaounde, Cameroon