1. Departments of Pediatric Infectious Diseases, University Hospital Gregorio Marañón and Gregorio Marañón Research Institute (IiSGM), Madrid
2. Spain Universidad Complutense de Madrid, Spain
3. Department of Pediatric Infectious Diseases, University Hospital La Paz and La Paz Research Institute (IdiPAZ), Madrid, Spain
4. Department of Pediatrics, Universidad Autonoma de Madrid, Madrid, Spain
5. Department of Pediatric Infectious Diseases, Universidad Autónoma de Madrid, Spain
6. Unit of infectious Diseases and Systemic Inflammatory Response and Hospital Sant Joan de Déu Research Institute, Barcelona, Spain
7. Department of Pediatrics, Universidad de Barcelona, Barcelona Spain
8. CIBER in Epidemiology and Public Health, CIBERESP, Madrid, Spain
9. Department of Pediatric Infectious Diseases, University Hospital La Fe, Valencia, Spain
10. Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain
11. Pediatric Infectious Diseases, Immunology and Rheumatology Unit, University Hospital Virgen del Rocío, Sevilla, Spain
12. Pediatric Infectious Diseases, Immunology and Rheumatology Unit, Instituto de Biomedicina de Sevilla (IBiS), Spain
13. Department of Pediatrics, Hospital Clinico San Carlos and Hospital Clinico San Carlos Research Institute, Madrid, Spain
14. Department of Pediatrics, Universidad Complutense de Madrid, Madrid, Spain
15. Department of Pediatrics, University Hospital Sant Joan d’Alacant, Alicante, Spain
16. Pediatric Infectious Diseases and HIV Unit, University Hospital 12 de Octubre, Madrid, Spain