1. Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University of Bonn, Bonn, Germany
2. Department of Obstetrics and Prenatal Medicine, University of Bonn, Bonn, Germany
3. Institute of Pathology, University of Heidelberg, Heidelberg, Germany
4. Neonatology and Pediatric Intensive Care, Department of Pediatrics, University of Marburg, Marburg, Germany
5. Division of Neonatology and Pediatric Intensive Care, Department of Pediatrics, University Hospital Erlangen, University of Erlangen-Nürnberg, Erlangen, Germany