University Children's Hospital Tübingen, Tübingen, Baden-Württemberg, Germany
University Medical Center for Children and Adolescents Heidelberg, Heidelberg, Baden-Württemberg, Germany
University Hospital Düsseldorf, Clinic for Pediatric Oncology, Hematology and Clinical Immunology, Düsseldorf, Nordrhein-Westfalen, Germany
University Hospital Graz, Graz, Austria
St. Anna Childrens Hospital, Vienna, Austria
University Hospital Greifswald, Greifswald, Germany
University Children's Hospital, Tuebingen, Germany
Medizinische Hochschule Zentrum für Kinderheilkunde, Hannover, Germany
Lutz Naehrlich, Giessen, Germany
Joachim Riethmueller, Tuebingen, Germany
Jochen Mainz, Jena, Germany
University Children's Hospital, Tuebingen, Germany
University Hospital of Tomas Bati, Department of Neonatology, Zlin, Czech Republic
Tampere University Hospita, NICU, Tampere, Finland
Erasmus MC - Sophia, Department of Neonatology, Rotterdam, Netherlands