1. Malformation Monitoring Centre Saxony‐AnhaltMedical Faculty Otto‐von‐Guericke University Magdeburg Magdeburg Germany
2. Department of EpidemiologyEmory University Rollins School of Public Health Atlanta Georgia USA
3. Institute for Biometrics and Medical Informatics, University Magdeburg Magdeburg Germany
4. Department of PediatricsHospital Marienstift Magdeburg Magdeburg Germany
5. Department of Obstetrics and GynecologyHospital Marienstift Magdeburg Magdeburg Germany
6. Department of PediatricsHospital Magdeburg gGmbH Magdeburg Germany
7. Department of Obstetrics and GynaecologyUniversity Hospital Magdeburg Magdeburg Germany
8. Department of Obstetrics and GynecologyHospital Magdeburg GmbH Magdeburg Germany
9. Department of PaediatricsUniversity Hospital Magdeburg Magdeburg Germany