Royal College of Emergency Medicine, University of Bath, Statistical Consultant, Department of Anaesthesia, North Bristol NHS Trust, Royal College of Emergency Medicine, Emergency Department, Bristol Royal Hospital for Children, Department of Anaesthesia, North Bristol NHS Trust, University Hospitals Plymouth NHS Trust, Department of Cardiovascular Sciences, University of Manchester, Department of Emergency Medicine, Children’s Health Ireland at Crumlin, Emergency Department, University Hospital Waterford, Department of Emergency Medicine, St Vincent’s University Hospital, Emergency Department, Connolly Hospital Blanchardstown, Royal College of Emergency Medicine, College of Anaesthesiologists of Ireland, Independent, Independent, Independent and Independent

Imperial College London, Government of the United Kingdom - Institute of Cancer Research, Mater Dei Hospital, Imperial College London, affiliation not provided to SSRN, Fondazione Policlinico Universitario A. Gemelli IRCCS - Department of Woman and Child Health and Public Health, affiliation not provided to SSRN, Imperial College London - Department of Epidemiology and Biostatistics, Imperial College London, Ospedale Paediatrico Meyer Firenze, Leicester University, Karolinska Institutet - Department of Global Public Health, Jean Verdier Hospital, University College Dublin (UCD), Louis Mourier Hospital, University Medical Center - Erasmus MC, affiliation not provided to SSRN, Paracelsus Medical University Salzburg, Tallaght University Hospital, Children’s Health Ireland, University of Szeged - Albert-Szent Györgyi Medical Centre, Hospital Universitario Cruces, Medical University of Vienna, Sorbonne University - Pediatric Emergency Deparment, Government of the United Kingdom - Birmingham Women’s and Children’s NHS Foundation Trust, Ludwig Maximilian University of Munich (LMU), Lithuanian University of Health Sciences, Medical University of Graz, affiliation not provided to SSRN, Emergency Department, Bristol Royal Hospital for Children, Coimbra Hospital and University Centre (CHUC), Hospital Dr. Fernando da Fonseca, Alder Hey Children's NHS Foundation Trust, Ondokuz Mayis University, Riga Stradins University, Centro Hospitalar Tondela-Viseu, Hopital Universitaire Robert-Debre, Karolinska Institutet, Hacettepe University Medical School, Mersin City Training and Research Hospital, Barnaspitali Hringsins Children's Hospital, Hospital Río Hortega de Valladolid, Padua University and Hospital, University Medical Center - Erasmus MC, University Medical Center - Erasmus MC and Hôpital Robert Debré