1. Johns Hopkins University School of Medicine, Baltimore, Maryland
2. University of Washington School of Medicine, Seattle, Washington
3. Cystic Fibrosis Foundation Therapeutic Development Network, Seattle Children’s Hospital, Seattle, Washington
4. Cystic Fibrosis Foundation, Bethesda, Maryland
5. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
6. Stanford University School of Medicine, Palo Alto, California
7. University of Cincinnati, Cincinnati, Ohio; and
8. Univeristy of Alabama at Birmingham, Birmingham, Alabama