1. Institute for Experimental Treatment of Cystic Fibrosis, San Raffaele Scientific Institute, 20132 Milan, Italy.
2. Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, B-9000 Ghent, Belgium.
3. Infections and Cystic Fibrosis Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, 20132 Milan, Italy.
4. Department of Biomedical Sciences, University of Foggia, 71100 Foggia, Italy.