1. Pediatric Infectious Diseases Unit, Department of Pediatrics, Hospital Universitario 12 de Octubre , Madrid , Spain
2. Pediatric Research and Clinical Trials Unit (UPIC), Instituto de Investigación Sanitaria Hospital 12 de Octubre (IMAS12) , Madrid , Spain
3. Fundación para la Investigación Biomédica del Hospital 12 de Octubre , Madrid , Spain
4. RITIP (Translational Research Network in Pediatric Infectious Diseases) , Madrid , Spain
5. Department of Pediatrics, Hospital Universitario Sant Joan de Deu , Barcelona , Spain
6. Pediatric Intensive Care Unit, Pediatrics Department, Hospital Universitario Niño Jesús , Madrid , Spain
7. Pediatrics, Infectious and Tropical Diseases Department, Hospital Universitario La Paz, Instituto Investigación Hospital La Paz (IDIPaz), Madrid , Spain
8. RITIP (Translational Research Network in Pediatric Infectious Diseases), CIBER en Enfermedades Infecciosas (CIBERINFEC) (ISCIII) , Madrid , Spain
9. Pediatric Intensive Care Unit, Hospital Universitario Central de Asturias , Oviedo , Spain
10. Infection in Immunocompromised Pediatric Patients Research Group, Vall d’Hebron Institut de Recerca (VHIR), Hospital Universitari Vall d’Hebron , Barcelona , Spain
11. Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d’Hebron , Barcelona , Spain
12. Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies , Barcelona , Spain
13. Pediatric Infectious Diseases Unit, Pediatric Department, Hospital Universitario Son Espases , Palma (Illes Balears) , Spain
14. Pediatric Oncology Group, Biocruces Bizkaia Health Research Institute , Barakaldo , Bizkaia , Spain
15. Pediatric Infectious Diseases Unit, Pediatric Department, Hospital Universitario Sant Joan de Deu , Barcelona , Spain
16. Pediatric Hemato-Oncology Unit, Pediatric Department, Hospital Universitario Niño Jesús , Madrid , Spain
17. Pediatric Infectious Diseases Unit, Department of Pediatrics, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón (IiGM) , Madrid , Spain
18. CIBER en Enfermedades Infecciosas (CIBERINFEC) (ISCIII) , Madrid , Spain
19. Pediatrics Department, Pediatrics Research Group, Hospital Universitario Infanta Sofía, Universidad Europea de Madrid , Madrid , Spain