1. Division of Pediatrics, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Stockholm, Sweden
2. Department of Neonatal Medicine, Karolinska University Hospital, Stockholm, Sweden
3. Swedish Neonatal Quality Register, Umeå University Hospital, Umeå, Sweden
4. Departments of Clinical and Experimental Medicine and Pediatrics, Linköping University, Linköping, Sweden
5. Departments of Clinical Sciences and Pediatrics, Lund University and Skåne University Hospital, Lund, Sweden
6. Departments of Clinical Sciences and Pediatrics, Umeå University, Umeå Sweden
7. Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
8. Department of Pediatrics, Ryhov County Hospital, Jönköping County Council, Jonkoping, Sweden
9. Centre for Reproductive Epidemiology, Lund University, Lund, Sweden
10. Departments of Clinical Sciences and Obstetrics and Gynecology, Lund University, Skåne University Hospital, Lund, Sweden
11. Division of Clinical Epidemiology, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
12. Division of Obstetrics and Gynecology, Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
13. Department of Pediatrics, Institute for Clinical Sciences, Queen Silvia Children’s Hospital, Sahlgrenska Academy, Göteborg University, Göteborg, Sweden
14. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
15. Sachs’ Children and Youth Hospital, Department of Neonatal Medicine, Södersjukhuset, Stockholm, Sweden