1. Department of Neonatology and Paediatric Intensive Care, University of Bonn, Bonn, Germany
2. University Children’s Hospital of Cologne, Medical Faculty, University of Cologne, Cologne, Germany
3. Department of Otorhinolaryngology, Head and Neck Surgery, Pan Clinic Neumarkt, Cologne, Germany
4. Department of Obstetrics and Prenatal Medicine, University of Bonn, Bonn, Germany
5. Medical Centre Oldenburg University, Children’s Hospital Oldenburg, Oldenburg, Germany