1. Neonatal Intensive Care Unit; University Hospital; Uppsala Sweden
2. Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
3. Department of Clinical Sciences Lund, Paediatrics; Lund University, Skåne University Hospital; Lund Sweden
4. Cochrane Sweden; Lund University, Skåne University Hospital; Lund Sweden
5. Newborns' Infectious Diseases Department; Poznan University of Medical Sciences; Poznan Poland
6. Department of Pediatrics, Faculty of Medicine and Health; Örebro University; Örebro Sweden
7. Faculty of Medicine and Health, School of Health Sciences; Örebro University; Örebro Sweden