1. Pediatric Infectious Diseases Department, Gregorio Marañón University Hospital, 28007 Madrid, Spain
2. Gregorio Marañón Research Health Institute (IiSGM), Translational Research in Pediatric Infectious Diseases (RITIP), 28007 Madrid, Spain
3. Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFECC), Instituto de Salud Carlos III, 28029 Madrid, Spain
4. Medicine Faculty, Complutense University of Madrid, 28040 Madrid, Spain
5. Department of Pediatrics, Clínico San Carlos Hospital, Clínico San Carlos Research Health Institute (IdISSC), 28040 Madrid, Spain
6. Department of Pediatrics, La Paz University Hospital, 28046 Madrid, Spain
7. Department of Pediatrics, Torrejon Hospital, 28850 Madrid, Spain
8. Department of Pediatrics, Infectious and Tropical Diseases, Paediatrics, La Paz University Hospital, Paseo de la Castellana, 261, 28046 Madrid, Spain
9. La Paz Hospital and La Paz Research Institute (IdiPAZ), Translational Research in Pediatric Infectious Diseases (RITIP), 28046 Madrid, Spain
10. Medicine Faculty, Autónoma University of Madrid, 28049 Madrid, Spain