1. Microbiology Department, Hospital Universitario Donostia-Instituto de Investigación Sanitaria Biodonostia, San Sebastián, Spain
2. Biomedical Research Center Network for Respiratory Diseases (CIBERES), Madrid, Spain
3. Microbiology and Virology Unit, Padua University Hospital, Padua, Italy
4. Faculty of Medicine, University of the Basque Country, UPV/EHU, San Sebastián, Spain