1. aDepartment of Women’s and Children’s Health, University of Padova, Padua, Italy
2. bNow at the Permanente Medical Group, Oakland, California
3. dDepartments of Pediatrics
4. cDepartment of Pediatrics, Section of Emergency Medicine, Texas Children’s Hospital and Baylor College of Medicine, Houston, Texas
5. eEmergency Medicine, University of California Davis School of Medicine, Sacramento, California