University of Southampton, University of Oxford, University of Southampton - NIHR Southampton Clinical Research Facility and Biomedical Research Centre, Université de Lille, Children’s Hospital Horst-Schmidt-Kliniken Wiesbaden, Liverpool School of Tropical Medicine - Department of Clinical Sciences, Liverpool School of Tropical Medicine, Gemeinschaftspraxis für Kinder und Jugendmedizin, Association Clinique et Thérapeutique Infantile du Val-de-Marne (ACTIV), Charles Nicolle University Hospital of Tunis, Sanofi, Sanofi, Sanofi, Sanofi, Sanofi, Sanofi, Sanofi, University of Paris-Saclay - Division of Pediatrics and Neonatal Critical Care, University of Nottingham, University of Southampton - NIHR Southampton Clinical Research Facility and Biomedical Research Centre and Independent