1. Department of Obstetrics and GynecologyUniversity Hospital Brugmann Brussels Belgium
2. Harris Birthright Research Centre for Fetal MedicineKing's College Hospital London UK
3. Department of Molecular Genetics, Labco Diagnostic, Barcelona, Spain and Department of Biologia CellularUniversitat Autonoma de Barcelona Barcelona Spain
4. GENDIA (GENetic DIAgnostic Network) Antwerp Belgium