1. Department of Neonatology and Pediatric Intensive Care, University Children’s Hospital Greifswald, Greifswald, Germany
2. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Greifswald, Greifswald, Germany
3. Institute of Clinical Chemistry, Klinikum Harlaching, Munich Municipal Hospital, München, Germany
4. Roche Diagnostics GmbH, Mannheim, Germany