1. Section of Hematology, Department of Internal Medicine and Yale Comprehensive Cancer Center,
2. Department of Pharmacology, Vascular Biology and Therapeutics Program, and
3. Department of Pediatrics, Yale University School of Medicine, New Haven, CT;
4. European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy; and
5. Department of Biological Science, Biomedical Engineering and Biotechnology, University of Massachusetts, Lowell, MA