1. St. Georges University Hospital NHS Foundation Trust, London SW17 0QT, UK
2. Wellcome Wolfson Institute of Experimental Medicine, Queen’s University Belfast, Belfast BT9 7BL, UK
3. Emergency Department, Cork University Hospital, Wilton, T12 DC4A Cork, Ireland
4. Pediatric Emergency Unit, Hospital Universitari Parc Tauli, Institut d’Investigació i Innovació I3PT, 08208 Sabadell, Spain