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); Fundación para la Investigación Biomédica del Hospital 12 de Octubre, Madrid, Spain, RITIP (Traslational Research Network in Pediatric Infectious Diseases)
3. Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d’Hebron, Vall d’Hebron Research Institute, Barcelona, Spain
4. Infectious and Imported Diseases Unit, Department of Pediatrics, Sant Joan de Déu Universitary Hospital Research Foundation, Barcelona, Spain
5. Pediatric Infectious Diseases Unit, Hospital Universitario Gregorio Marañón, Madrid, Spain
6. Pediatrics and Infectious Disease Unit, Pediatrics Department, Hospital Universitario La Paz. Fundación IdiPaz, Madrid, Spain, Red de Investigación Traslacional en Infectología Pediátrica (RITIP)
7. Pediatrics Department. Hospital Universitario Infanta Cristina, Parla, Madrid, Spain
8. Pediatrics Department, Hospital Universitario de Getafe, Getafe, Madrid, Spain
9. Pediatrics Department, Hospital Universitario Son Espases. Palma de Mallorca, Illes Baleares, Spain
10. Pediatrics Department, Hospital Universitario San Pedro, Logroño, La Rioja, Spain
11. Pediatrics Department, Complejo Hospitalario de Navarra, Pamplona, Navarra, Spain
12. Complejo Hospitalario Universitario de Albacete, Albacete, Castilla-La Mancha, Spain
13. Pediatrics Department. Hospital Universitario Niño Jesús, Madrid, Spain
14. Pediatric Intensive Care Unit, Sant Joan de Deu Universitary Hospital, CIBERES, Barcelona, Spain
15. Pediatric Intensive Care Unit, Department of Pediatrics, Hospital Universitario 12 de Octubre, School of Medicine, Complutense University of Madrid, Mother-Child Health and Development Network (Red SAMID) of Carlos III Health Institute, Madrid, Spain
16. Pediatric Cardiology Unit, Department of Pediatrics, Hospital Universitario 12 de Octubre, Madrid, Spain
17. Department of Paediatric Cardiology, H.G.U. Gregorio Marañón, Madrid, Spain
18. Pediatrics Department, Hospital Universitario Infanta Sofía, Pediatrics Research Group, Universidad Europea de Madrid, Madrid, Spain