1. Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University Hospital Erlangen, University of Erlangen-Nuremberg, Erlangen, Germany;
2. Department of Pediatrics I, Neonatology, Pediatric Intensive Care, Pediatric Neurology, University Hospital Essen, University Duisburg-Essen, Essen, Germany;
3. Department of Neonatology and Pediatric Intensive Care, Children’s Hospital, University of Bonn, Bonn, Germany;
4. Department of Pediatric Surgery, University Hospital of Erlangen, University of Erlangen-Nuremberg, Erlangen, Germany;
5. Department of Gynecology and Obstetrics, University Hospital Essen, University Duisburg-Essen, Essen, Germany