1. Department of Clinical Microbiology, Hospital Universitari Vall d'Hebron, Barcelona, Spain
2. Department of Microbiology and Genetics, Universitat Autònoma de Barcelona, Barcelona, Spain
3. Primary Care Health Centre Service 'Muntanya', Catalan Institute of Health, Barcelona, Spain
4. Department of Paediatrics, Hospital Universitari Vall d'Hebron, Barcelona, Spain
5. Department of Preventive Medicine and Epidemiology, Hospital Universitari Vall d'Hebron, Barcelona, Spain
6. Public Health Agency of Catalonia, Barcelona, Spain
7. Faculty of Health Sciences, University of Vic – Central University of Catalonia (UVic-UCC), Manresa, Spain