1. Pediatrics Department, Pediatrics Research Group, Hospital Universitario Infanta Sofía Universidad Europea de Madrid Madrid Spain
2. Pediatric Research and Clinical Trials Unit (UPIC), Pediatrics Department, Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Fundación de Investigación Biomédica Hospital 12 de Octubre RITIP (Translational Research Network in Paediatric Infectious Diseases) Madrid Spain
3. Pediatrics, Infectious and Tropical Diseases Department, Hospital Universitario La Paz, Instituto Investigación Hospital La Paz (IDIPaz) RITIP (Translational Research Network in Paediatric Infectious Diseases) Madrid Spain
4. Research Center, Centro de Investigación en Red en Enfermedades Infecciosas (CIBERINFEC) Instituto de Salud Carlos III, Madrid, Spain Madrid Spain
5. Pediatrics Department Hospital Universitario Niño Jesús Madrid Spain
6. Infectious Diseases and Pediatric Immunology Unit, Department of Pediatrics Hospital Universitario Vall d'Hebron Barcelona Spain
7. Pediatric Infectious Diseases Unit, Department of Pediatrics Hospital Universitario Gregorio Marañón Madrid Spain
8. Research Center Gregorio Marañón Research Institute (IiSGM) Madrid Spain
9. Pediatric Infectious Diseases Unit, Department of Pediatrics Hospital Universitario 12 de Octubre Madrid Spain
10. Pediatrics Department Complejo Hospitalario de Navarra Pamplona Spain
11. Pediatrics Department Hospital Universitario Clínico San Carlos Madrid Spain
12. Pediatric Intensive Care Unit Department Hospital La Moraleja Madrid Spain
13. Pediatric Infectious Diseases Unit, Pediatrics Department Hospital Universitari i Politècnic La Fe Valencia Spain
14. Pediatrics Department, Hospital Universitario Ramón y Cajal Universidad de Alcalá Madrid Madrid Spain
15. Microbiology Department, Hospital Universitario Ramón y Cajal Instituto Ramón y Cajal para la Investigación Sanitaria (IRYCIS) Madrid Spain
16. Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP) Madrid Spain