1. Clinic of Neonatology, Department of Pediatrics, University of Heidelberg, Im Neuenheimer Feld, Heidelberg, Germany
2. Technical Expert’s Bureau for Rheology, Am Seeberg 14a, Bad Homburg vor der Höhe, Germany
3. Clinic of Pediatrics, SLK-Kliniken Heilbronn GmbH, Heilbronn, Germany