1. Copenhagen Trial Unit, Centre for Clinical Intervention Research; The Capital Region of Denmark, Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
2. Neonatal Intensive Care Unit; Ospedale "A. Manzoni"; Lecco Italy
3. Department of Neonatology; Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
4. Neonatology; Beth Israel Deaconess Medical Center; Boston Massachusetts USA
5. Pediatric and Neonatal Intensive Care Unit; Paris South University Hospitals Le Kremlin-Bicêtre; Paris France
6. Cochrane Hepato-Biliary Group, Copenhagen Trial Unit, Centre for Clinical Intervention Research; The Capital Region of Denmark, Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
7. Department of Regional Health Research, The Faculty of Health Sciences; University of Southern Denmark; Odense Denmark