Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Crossover Study to Evaluate the Efficacy and Safety of Ivacaftor and VX-661 in Combination With Ivacaftor in Subjects Aged 12 Years and Older With Cystic Fibrosis, Heterozygous for the F508del-CFTR Mutation, and a Second Allele With a CFTR Mutation Predicted to Have Residual Function
Brief Summary: The purpose of this study is to evaluate the efficacy and safety of VX-661 in combination with ivacaftor (IVA, VX-770) and IVA monotherapy in participants with Cystic Fibrosis (CF) who are heterozygous for F508del-CFTR allele and a second allele with a CFTR mutation predicted to have residual function.


Options:
A: Arm Label: Arm 1 Part A: LUM 600 mg qd/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination, Drug: Ivacaftor | Arm Label: Arm 2 Part A: Placebo - LUM 600 mg qd/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination, Drug: Ivacaftor | Arm Label: Arm 3 Part A: LUM 400 mg q12h/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination | Arm Label: Arm 4 Part A: Placebo - LUM 400 mg q12h/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination | Arm Label: Arm 5 Part A: Observational Cohort; Type: NO_INTERVENTION; Interventions: N/A | Arm Label: Arm 6 Part B: LUM 400 mg q12h/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination | Arm Label: Arm 7 Part B: Placebo - LUM 400 mg q12h/ IVA 250 mg q12h; Type: EXPERIMENTAL; Interventions: Drug: Lumacaftor Plus Ivacaftor Combination | Intervention Type: DRUG; Name: Lumacaftor Plus Ivacaftor Combination; Assigned to Arm(s): Arm 1 Part A: LUM 600 mg qd/ IVA 250 mg q12h, Arm 2 Part A: Placebo - LUM 600 mg qd/ IVA 250 mg q12h, Arm 3 Part A: LUM 400 mg q12h/ IVA 250 mg q12h, Arm 4 Part A: Placebo - LUM 400 mg q12h/ IVA 250 mg q12h, Arm 6 Part B: LUM 400 mg q12h/ IVA 250 mg q12h, Arm 7 Part B: Placebo - LUM 400 mg q12h/ IVA 250 mg q12h | Intervention Type: DRUG; Name: Ivacaftor; Assigned to Arm(s): Arm 1 Part A: LUM 600 mg qd/ IVA 250 mg q12h, Arm 2 Part A: Placebo - LUM 600 mg qd/ IVA 250 mg q12h
B: Arm Label: VX-661/Ivacaftor combination; Type: EXPERIMENTAL; Interventions: Drug: VX-661/Ivacaftor, Drug: Ivacaftor, Drug: Placebo matched to Ivacaftor | Arm Label: Ivacaftor monotherapy; Type: EXPERIMENTAL; Interventions: Drug: Ivacaftor, Drug: Placebo matched to VX-661/ ivacaftor | Arm Label: Placebo; Type: PLACEBO_COMPARATOR; Interventions: Drug: Placebo matched to VX-661/ ivacaftor, Drug: Placebo matched to Ivacaftor | Intervention Type: DRUG; Name: VX-661/Ivacaftor; Assigned to Arm(s): VX-661/Ivacaftor combination | Intervention Type: DRUG; Name: Ivacaftor; Assigned to Arm(s): Ivacaftor monotherapy, VX-661/Ivacaftor combination | Intervention Type: DRUG; Name: Placebo matched to VX-661/ ivacaftor; Assigned to Arm(s): Ivacaftor monotherapy, Placebo | Intervention Type: DRUG; Name: Placebo matched to Ivacaftor; Assigned to Arm(s): Placebo, VX-661/Ivacaftor combination
C: Arm Label: ELX/TEZ/IVA; Type: EXPERIMENTAL; Interventions: Drug: ELX/TEZ/IVA, Drug: IVA | Intervention Type: DRUG; Name: ELX/TEZ/IVA; Assigned to Arm(s): ELX/TEZ/IVA | Intervention Type: DRUG; Name: IVA; Assigned to Arm(s): ELX/TEZ/IVA
D: Arm Label: Placebo; Type: OTHER; Interventions: Drug: Placebo | Arm Label: TEZ/IVA; Type: EXPERIMENTAL; Interventions: Drug: TEZ/IVA, Drug: IVA, Drug: Placebo | Arm Label: Ivacaftor; Type: EXPERIMENTAL; Interventions: Drug: IVA, Drug: Placebo | Intervention Type: DRUG; Name: TEZ/IVA; Assigned to Arm(s): TEZ/IVA | Intervention Type: DRUG; Name: IVA; Assigned to Arm(s): Ivacaftor, TEZ/IVA | Intervention Type: DRUG; Name: Placebo; Assigned to Arm(s): Ivacaftor, Placebo | Intervention Type: DRUG; Name: Placebo; Assigned to Arm(s): Placebo, TEZ/IVA

Answer: B