1. Adjoints, Pediatric Department, Free University of Brussels.
2. Inspecteur de Laboratoire, Department of Hematology, Hôpital Saint-Pierre.
3. Chercheur, Department of Pediatrics, Free University of Brussels.
4. Assistant, Laboratory of Toxicology of the Institute of Pharmacy.
5. Maître de Stages, Department of Clinical Chemistry, Hôpital Saint-Pierre.