1. Maternal-Infant Care Research Centre; Mount Sinai Hospital; Toronto ON Canada
2. UK Neonatal Collaborative; Neonatal Data Analysis Unit; Section of Neonatal Medicine; Department of Medicine; Imperial College London; London UK
3. Department of Pediatrics; Mount Sinai Hospital and University of Toronto; Toronto ON Canada
4. Swedish Neonatal Quality Register; Department of Pediatrics/Neonatal Services; Umeå University Hospital; Umeå Sweden
5. Pediatrics and Neonatology Division; Ospedale Versilia; Viareggio Italy
6. Finnish Medical Birth Register and Register of Congenital Malformations; Department of Pediatrics; Turku University Hospital; Turku Finland
7. Spanish Neonatal Network; Health Research Institute La Fe; Valencia Spain
8. Neonatal Research Network Japan; Maternal and Perinatal Center; Tokyo Women's Medical University; Tokyo Japan
9. Swiss Neonatal Network; Department of Neonatology; University Hospital Zurich; University of Zurich; Zurich Switzerland
10. Israel Neonatal Network; Gertner Institute for Epidemiology and Health Policy Research; Sheba Medical Centre; Tel Hashomer Israel
11. Australia and New Zealand Neonatal Network; Department of Paediatrics; University of Otago; Christchurch New Zealand
12. TIN Toscane Online; Unit of Epidemiology; Meyer Children's University Hospital; Florence Italy
13. Australian and New Zealand Neonatal Network; Royal Hospital for Women; National Perinatal Epidemiology and Statistic Unit; University of New South Wales; Randwick NSW Australia