1. Pediatric Emergency Department, Cruces University Hospital, Bilbao, Spain;
2. University of the Basque Country, Bilbao, Spain;
3. Pediatric Emergency Unit - Department of Woman's and Child Health, University of Padova, Italy;
4. Ca’Foncello Hospital, Treviso, Italy; and
5. Pediatric Emergency Division, Geneva University Hospitals and University of Geneva, Geneva, Switzerland