1. Chelsea and Westminster National Health Service Foundation Trust, London, United Kingdom
2. Section of Neonatal Medicine, Department of Medicine, Imperial College London,
3. Imperial Clinical Trials Unit, School of Public Health,
4. Clinical Trials and Evaluation Unit, Royal Brompton and Harefield National Health Service Foundation Trust, London, United Kingdom
5. Comprehensive Clinical Trials Unit, University College London, London, United Kingdom
6. Warwick Clinical Trials Unit, Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry, United Kingdom
7. Institute of Clinical Sciences, Imperial College London and Medical Research Council Clinical Sciences Centre, Hammersmith Hospital, London, United Kingdom
8. Department of Life Sciences, University of Westminster, London, United Kingdom