1. Pediatric Infectious and Tropical Diseases Department, La Paz University Hospital, Madrid, Spain
2. Departments of Paediatric Endocrinology, La Paz University Hospital, Madrid, Spain
3. Pediatric Critical Care Unit, Hospital Infantil Universitario Niño Jesús, Madrid, Spain
4. Emergency Department, Hospital Infantil Universitario Niño Jesús, Madrid, Spain
5. Pediatric Otorhinolaryngology Department, La Paz University Hospital, Madrid, Spain
6. Department of Paediatric Radiology, La Paz University Hospital, Madrid, Spain
7. Pediatric Otorhinolaryngology Department, Hospital Infantil Universitario Niño Jesús, Madrid, Spain
8. Pediatrics Department, Hospital Universitario Niño Jesús, Madrid, Spain
9. Pediatric Infectious and Tropical Diseases Department, La Paz University Hospital, Institute for Health Research (IdiPAZ), Madrid, Spain
10. Autonomous University of Madrid (UAM), Translational Research Network in Pediatric Infectious Diseases (RITIP), CIBERINFEC, Carlos III Health Institute, Madrid, Spain