Study to Evaluate Safety and Efficacy of VX-661 in Combination With Ivacaftor in Subjects With Cystic Fibrosis, Homozygous for the F508del-CFTR Mutation With an Open-Label Expansion
Conditions
Interventions
- DRUG: VX-661
- DRUG: Ivacaftor
- DRUG: Placebo matched to VX-661
- DRUG: Placebo matched to Ivacaftor
Sponsor
Vertex Pharmaceuticals Incorporated