1. Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
2. Department of Paediatrics, Royal Hobart Hospital, Hobart, Australia
3. Neonatal Services, Royal Women’s Hospital, Melbourne, Australia
4. Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, Australia
5. Clinical Epidemiology and Biostatistics Unit, Murdoch Children’s Research Institute, Melbourne, Australia
6. Department of Neonatology, Zekai Tahir Burak Maternity Teaching Hospital, Ankara, Turkey
7. Division of Neonatology, Department of Pediatrics, Istanbul Kanuni Sultan Süleyman Training and Research Hospital, Istanbul, Turkey
8. Department of Perinatology, Division of Gynaecology and Obstetrics, University Medical Centre, Ljubljana, Slovenia
9. Division of Neonatology, NorthShore University Health System, Evanston, Illinois
10. Department of Pediatrics, Division of Neonatology, Uludağ University Faculty of Medicine, Bursa, Turkey
11. Division of Neonatology, Beatrix Children’s Hospital, University Medical Center Groningen, Groningen, the Netherlands
12. Division of Neonatology, Department of Pediatrics, University of Alberta, Edmonton, Canada
13. Neonatal Services, Mercy Hospital for Women, Heidelberg, Australia
14. Department of Obstetrics, Gynecology, and Newborn Care, Ottawa Hospital, Ottawa, Ontario, Canada
15. Department of Pediatrics, Kapi’olani Medical Center for Women and Children, Honolulu, Hawaii
16. Department of Neonatology, KK Women’s and Children’s Hospital, Duke-NUS Medical School, Singapore
17. Neonatal Unit, Royal Hospital for Children, Glasgow, Scotland
18. Division of Neonatology, Department of Pediatrics, LAC+USC Medical Center and Good Samaritan Hospital, Keck School of Medicine of USC, Los Angeles, California
19. Department of Pediatrics, Children’s Regional Hospital, Cooper University Health Care, Camden, New Jersey
20. Department of Neonatology, Bnai Zion Medical Center, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
21. Department of Neonatal Medicine, Chelsea and Westminster Hospital NHS Foundation Trust, London, England
22. Regional Neonatal Intensive Care Unit, University Hospital of Wales, Cardiff
23. Newborn Service, Starship Child Health, Auckland Hospital, Auckland, New Zealand
24. Monash Newborn, Monash Children’s Hospital, Clayton, Australia
25. Department of Neonatology, Singleton Hospital, Swansea, Wales
26. Department of Neonatology, Ziv Medical Center, Faculty of Medicine, Bar-Ilan University, Tsfat, Israel
27. Department of Neonatology, Centenary Hospital for Women and Children, Canberra Hospital, Woden, Australia
28. Neonatal Intensive Care Unit, Dunedin Hospital, Dunedin, New Zealand
29. Department of Neonatology, Rambam Medical Center, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
30. Division of Neonatology, Royal Brisbane and Women’s Hospital, Brisbane, Australia
31. Division of Neonatology, Peyton Manning Children’s Hospital, Ascension St Vincent, Indianapolis, Indiana
32. Neonatal Intensive Care Centre, Royal London Hospital-Barts Health NHS Foundation Trust, London, England
33. Division of Neonatology, Sidra Medicine, Doha, Qatar
34. Department of Pediatrics, WVU Medicine Children’s Hospital, Morgantown, West Virginia
35. Neonatal Intensive Care Unit, Princess Anne Hospital, Southampton, England
36. Department of Neonatology, EGA Institute for Women’s Health, Faculty of Population Health Sciences, University College London, London, England
37. Division of Neonatal-Perinatal Medicine, Larner College of Medicine, University of Vermont, Burlington
38. Department of Paediatrics, University of Melbourne, Melbourne, Australia
39. for the OPTIMIST-A Trial Investigators