1. From the Department of Critical Care Medicine and Surgery, Section of Neonatology, Careggi University Hospital, University of Florence Medical School, Florence, Italy;
2. Department of Pediatrics and Waisman Center, University of Wisconsin School of Medicine, Madison, Wisconsin;
3. Evangelisches Waldkrankenhaus Spandau, Der Humboldt Universität Zu Berlin, Berlin, Germany;
4. Imperial College School of Medicine, Hammersmith Hospital, London, England;
5. University Hospital Zürich, Zürich, Switzerland;
6. Centre d'Hemobiologie Périnatale, Hôpital Saint Antoine, Paris, France; and
7. Maternite Regionale A. Pinard, Nancy, France.