1. Division of Obstetrics University Hospital of Zurich Zurich Switzerland
2. The Zurich Centre for Fetal Diagnosis and Therapy University of Zurich Zurich Switzerland
3. Department of Paediatric Surgery University Children's Hospital Zurich Zurich Switzerland
4. Spina Bifida Centre University Children's Hospital Zurich Zurich Switzerland
5. Children's Research Centre University Children's Hospital Zurich Zurich Switzerland