1. Division of Neonatology, Pediatric Intensive Care, and Neuropediatrics, Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
2. Department of Neonatology and Pediatric Intensive Care Medicine, University Children’s Hospital, University Medical Center Hamburg Eppendorf, Germany
3. Information Retrieval Office, University Library of the Medical University of Vienna, Vienna, Austria