1. Division of Neonatal-Perinatal Medicine; University of Vermont; Burlington Vermont USA
2. Paediatrics, Department of Clinical Sciences Lund; Lund University, Skåne University Hospital; Lund Sweden
3. Cochrane Sweden, Department of Research and Education; Lund University, Skåne University Hospital; Lund Sweden
4. National Perinatal Epidemiology Unit, Clinical Trials Unit, Nuffield Department of Population Health, Medical Sciences Division; University of Oxford; Oxford UK
5. Faculty of Health Sciences; University of Bristol; Bristol UK
6. Newborn Services; Southmead Hospital, North Bristol Trust, Southmead Rd, Bristol BS10 5NB; Bristol UK
7. Newborn Research Centre and Neonatal Services; The Royal Women’s Hospital; Melbourne Australia
8. Cochrane Neonatal Group; Halifax (NS) Canada
9. Division of Neonatal-Perinatal Medicine, Department of Pediatrics; Larner College of Medicine at the University of Vermont; Burlington Vermont USA