1. Department of Pediatrics, Infectious Diseases Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain
2. Biomedical Research Networking Center on Infectious Diseases (CIBERINFEC), Instituto Carlos III, Madrid, Spain
3. Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain
4. Department of Pediatrics, Pediatric Hematology Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain
5. Department of Pharmacy, Hospital General Universitario Gregorio Marañón, Madrid, Spain.