1. Paediatric Infectious Diseases and Immunodeficiencies Unit, University Hospital Vall d’Hebron, Barcelona, Spain
2. Vall d’Hebron Research Institute, Autonomous University of Barcelona, Barcelona, Spain
3. Paediatric Oncology and Haematology Department, University Hospital Vall d’Hebron, Barcelona, Spain
4. Pharmacy Department, University Hospital Vall d’Hebron, Barcelona, Spain
5. Microbiology Department, University Hospital Vall d’Hebron, Barcelona, Spain
6. Autonomous University of Barcelona, Barcelona, Spain