1. Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland
2. University of Zurich, The Zurich Center for Fetal Diangosis and Therapy, Zurich, Switzerland
3. Faculty of Medicine, University of Zurich, Zurich, Switzerland
4. Obsterics and Prenatal Medicine, HELIOS HSK Wiesbaden, Wiesbaden, Germany
5. Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
6. Spina Bifida Center, University Children's Hospital Zurich, Zurich, Switzerland
7. Anesthiesiology, University Hospital Zurich, Zurich, Switzerland
8. Department of Pediatric Neurology, Baden Cantonal Hospital, Baden, Switzerland
9. Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland