1. Department of Obstetrics and Gynecology; Inselspital; University of Bern; Bern Switzerland
2. Institute of Diagnostic and Interventional Neuroradiology; Inselspital; University of Bern; Bern Switzerland
3. Division of Pediatric Neurology; Inselspital; University of Bern; Bern Switzerland
4. Prenatal Zürich; Zürich Switzerland
5. Medical Faculty; Heinrich Heine University; Düsseldorf Germany