1. Newcastle Hospitals NHS Trust, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
2. Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
3. Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
4. Section of Neonatal Medicine, School of Public Health, Imperial College London, London, United Kingdom
5. Chelsea and Westminster Hospital, NHS Foundation Trust, London, United Kingdom
6. Northumbria University, Newcastle upon Tyne, United Kingdom
7. James Cook University Hospital, Middlesbrough, United Kingdom
8. William Harvey Hospital, Ashford, Kent, United Kingdom