1. Pediatric and Neonatology Unit; Ospedale San Paolo; Savona Italy
2. Division of Neonatal-Perinatal Medicine, Department of Pediatrics; University of Louisville; Louisville Kentucky USA
3. Iberoamerican Cochrane Network; Barcelona Spain
4. Division of Neonatal-Perinatal Medicine, Department of Pediatrics; Larner College of Medicine at the University of Vermont; Burlington Vermont USA
5. Department of Clinical Sciences Lund, Paediatrics; Lund University, Skåne University Hospital; Lund Sweden
6. Cochrane Sweden; Lund University, Skåne University Hospital; Lund Sweden