1. Department of Medicine University of Barcelona Barcelona Spain
2. Public Health Agency of Catalonia Barcelona Spain
3. Ciber Epidemiology and Public Health CIBERESP, Instituto de Salud Carlos III Madrid Spain
4. Department of Microbiology Hospital Clínic of Barcelona Barcelona Spain
5. Respiratory Viruses Unit, Microbiology Department, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus Universitat Autònoma de Barcelona Barcelona Spain
6. Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III Madrid Spain
7. Public Health Agency of Barcelona Barcelona Spain