1. Cystic Fibrosis Center - Azienda Ospedaliera Universitaria Integrata di Verona, piazzale Stefani, 1-37126 Verona, Italy. Fax: +39 045 8122042; Tel: +39 045 8123419
2. Department of Pathology and Diagnostics, General Pathology Section, University di Verona, Strada Le Grazie, 8-37134 Verona, Italy. Fax: +39 045 8027127; Tel: +39 045 8027668
3. Institute for Biomedical Technologies (ITB-CNR), 20090 Segrate, Milan, Italy
4. Infections and Cystic Fibrosis Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, 20132, Milan, Italy
5. Institute of Medical Microbiology and Hygiene, University of Tübingen, Tübingen, Germany