1. II Department of Neonatology; Poznan University of Medical Sciences; Poznan Poland
2. Women and Children's Health; Karolinska Institute; Stockholm Sweden
3. FoUU; Karolinska University Hospital; Stockholm Sweden
4. St. Olavs Hospital; Trondheim Norway
5. Cochrane Neonatal Group; Halifax Canada
6. Division of Neonatal-Perinatal Medicine, Department of Pediatrics; Larner College of Medicine at the University of Vermont; Burlington Vermont USA
7. Cochrane Sweden, Department of Research and Education; Lund University, Skåne University Hospital; Lund Sweden