1. Center for Pediatric Clinical Studies, University Children’s Hospital Tübingen, Tübingen, Germany
2. Neonatology, University Children’s Hospital Tübingen, Tübingen, Germany
3. University Hospital Zurich, Department of Neonatology, University of Zurich, Zurich, Switzerland
4. Clinic for Pediatrics, Department for Neonatology and Pediatric Intensive Care Medicine, Medical Faculty, TU Dresden, Dresden, Germany
5. Children’s Hospital, Division of Neonatology, Department of Women and Children’s Health, University of Leipzig, Leipzig, Germany
6. Children’s Hospital, University Hospital, Philipps University Marburg, Marburg, Germany
7. Department of Paediatric Neurology and Developmental Medicine, University Children’s Hospital Tübingen, Tübingen, Germany
8. Institute for Epidemiology and Medical Biometry, University of Ulm, Ulm, Germany
9. University Hospital Ulm, Ulm, Germany
10. Charité Universitätsmedizin Berlin, Berlin, Germany
11. Pediatrics, University Hospital Münster, Münster, Germany
12. Vivantes Klinikum Neukölln, Berlin, Germany
13. Helios Klinikum Erfurt, Erfurt, Germany
14. Vestische Kinder-und Jugendklinik Datteln, Universität Witten/Herdecke, Datteln, Germany
15. Neonatology and Pediatric Intensive Care, University Hospital Düsseldorf, Düsseldorf, Germany
16. Department of General Pediatrics and Neonatology, Justus-Liebig-University Giessen, Giessen, Germany
17. Pediatrics, University Hospital Magdeburg, Magdeburg, Germany
18. Neonatology, Klinikum Links der Weser, Bremen, Germany
19. Department of Paediatrics I, University Duisburg-Essen, Essen, Germany
20. University Hospital Frankfurt, Frankfurt, Germany
21. Olgahospital, Klinikum Stuttgart, Stuttgart, Germany