1. Service de Gynécologie et Obstétrique, CHU Nantes, Nantes Cedex, France;
2. Service de Génétique Médicale, CHU Nantes, Nantes Cedex, France;
3. University Children's Hospital, Philipps University Marburg, Marburg, Germany;
4. Institute of Human Genetics, University of Cologne, Cologne, Germany;
5. Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany;
6. Service de Pédiatrie, CHU Nantes, Nantes, France;
7. Service de Cardiologie Pédiatrique, CHU Nantes, Nantes, France