1. Department of General Paediatrics, Adolescent Medicine and Neonatology Medical Centre‐University of Freiburg, Faculty of Medicine Freiburg Germany
2. Institute of Experimental Hematology and Transfusion Medicine University Hospital Bonn Bonn Germany
3. Department of Obstetrics and Prenatal Medicine University Bonn Medical School Bonn Germany
4. Department of Pediatric Cardiology University Hospital Bonn Bonn Germany