1. Division of Prenatal Medicine, University-Hospital of Cologne, Germany
2. Department of Obstetrics and Prenatal Medicine, University-Hospital of Bonn, Germany
3. Praenatal.plus Prenatal Medicine and Genetics, praenatal.plus Cologne, Germany
4. Department of Pediatric Cardiology, University-Hospital of Bonn, Germany
5. Department of Pediatric Cardiology, University-Hospital of Cologne, Germany