1. Department of Anesthesiology and Intensive Care Medicine, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, 13353 Berlin, Germany
2. Department of Pediatrics I, Neonatology, University Hospital Essen, 45122 Essen, Germany
3. Department of Neonatology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany