1. Department of Women’s and Children’s Health Uppsala University Uppsala Sweden
2. Uppsala University Hospital Uppsala Sweden
3. Department of Medicine, Solna Karolinska Institutet Stockholm Sweden
4. Institute of Clinical Sciences, Sahlgrenska Academy Gothenburg University Gothenburg Sweden
5. Sahlgrenska University Hospital Gothenburg Sweden
6. Department Women’s and Children’s Health Karolinska Institutet Stockholm Sweden
7. Västervik Hospital Västervik Sweden
8. Department of Clinical Science, Intervention and Technology Karolinska Institutet Stockholm Sweden
9. Department of Neonatal Medicine Karolinska University Hospital Stockholm Sweden
10. Swedish Neonatal Quality Register Stockholm Sweden