1. II Department of Neonatology; Poznan University of Medical Sciences; Poznan Poland
2. Pediatrics; Dartmouth-Hitchcock Medical Center; Lebanon New Hampshire USA
3. Obstetric Anesthesia Department; Emergency County Hospital; Tirgu Mures Romania
4. Paediatrics, Department of Clinical Sciences Lund; Lund University, Skåne University Hospital; Lund Sweden
5. Cochrane Sweden, Department of Research and Education; Lund University, Skåne University Hospital; Lund Sweden
6. Division of Neonatal-Perinatal Medicine, Department of Pediatrics; Larner College of Medicine at the University of Vermont; Burlington Vermont USA