1. Department of Paediatrics, University Hospital of Schleswig‐Holstein University of Lübeck Lübeck Germany
2. Department of Paediatrics Faculty of Medicine and University Hospital of Cologne Cologne Germany
3. Department of Neonatology, Vest Children's Hospital Datteln University Witten‐Herdecke Datteln Germany
4. Children's Hospital Aschaffenburg‐Alzenau Aschaffenburg Germany
5. Department of Neonatology, University Children's Hospital Ruhr University Bochum Bochum Germany
6. Department of General Paediatrics University Hospital Düsseldorf Düsseldorf Germany
7. Department of Paediatrics Hospital Köln‐Porz Germany
8. Olgahospital Stuttgart Stuttgart Germany
9. Department of Neonatology and Paediatric Intensive Care Medicine Children's Hospital Cologne Germany
10. Department of Neonatology Charité Universitätsmedizin Berlin Berlin Germany
11. DRK‐Children's Hospital Department of Neonatology and Paediatric Intensive Care Siegen Germany
12. Children's Hospital Leverkusen Leverkusen Germany
13. Department of Neonatology Asklepios Klinik Barmbek Hamburg Germany
14. Institute of Medical Biometry and Statistics University of Lübeck Germany
15. Children's Hospital University of Würzburg Würzburg Germany