University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), Department of Community Based Medicine, University of Bristol, University of Bristol - ALSPAC, University of Bristol, University of Bristol, University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University of Bristol, University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), University Hospitals Bristol & Weston NHS Foundation Trust - National Institute for Health Research Applied Research Collaboration West (NIHR ARC West), Government of the United Kingdom - Oxford University Hospitals NHS Foundation Trust, University of Bristol and University of Bristol - Bristol Neonatal Neurology Group