1. Department of Medicine, Clinical Epidemiology, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
2. Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
3. Department of Pediatrics, Mount Sinai Hospital, Toronto, Ontario, Canada
4. Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
5. Maternal-Infant Care Research Centre, Mount Sinai Hospital, Toronto, Ontario, Canada
6. Unit of Epidemiology Meyer Children’s University Hospital and Regional Health Agency, Florence, Italy
7. Israel Neonatal Network, Gertner Institute for Epidemiology and Health Policy Research, Tel Hashomer, Israel
8. Neonatal Data Analysis Unit, Section of Neonatal Medicine, Department of Medicine, Imperial College London, Chelsea and Westminster campus, London, England
9. Division of Neonatology, National Center for Child Health and Development, Tokyo, Japan
10. Turku University Hospital and University of Turku, Finland
11. Department of Clinical Science/Pediatrics, Umeå University, Umeå, Sweden
12. Department of Pediatrics, McGill University Health Centre, Montreal, Québec, Canada
13. Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
14. Department of Neonatal Medicine, Karolinska University Hospital, Stockholm, Sweden