| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 20.0 | 
 
| E.1.2 | Level  | SOC | 
 
| E.1.2 | Classification code  | 10010331 | 
 
| E.1.2 | Term  | Congenital, familial and genetic disorders | 
 
| E.1.2 | System Organ Class  | 10010331 - Congenital, familial and genetic disorders | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
Part A: to evaluate the PK of LUM and IVA and their metabolites Part B: to evaluate the safety of LUM/IVA | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
Part A: To evaluate the safety of LUM/IVA  Part B: To evaluate the PD of LUM/IVA | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
    - Subjects who weigh ≥8 kilogram (kg) without shoes and wearing light clothing at the Screening Visit     - Subjects with confirmed diagnosis of CF at the Screening Visit     - Subjects who are homozygous for the F508del Cystic fibrosis transmembrane conductance regulator (CFTR) mutation 
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| E.4 | Principal exclusion criteria | 
 - Any clinically significant laboratory abnormalities at the Screening Visit that would interfere with the study assessments or pose an undue risk for the subject  - An acute upper or lower respiratory infection, pulmonary exacerbation, or changes in therapy (including antibiotics)      for pulmonary disease within 28 days before Day 1  - A standard 12 lead ECG demonstrating QTc >450 millisecond (msec) at the Screening Visit.  - History of solid organ or hematological transplantation.  - Ongoing or prior participation in an investigational drug study (including studies investigating LUM and/or IVA) within     30 days of the Screening Visit.  - History of cataract/lens opacity or evidence of cataract/lens opacity determined to be clinically significant by a      licensed ophthalmologist during the ophthalmologic examination at the Screening Visit | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
 - Part A: Pharmacokinetic (PK) parameters of lumacaftor (LUM) and ivacaftor (IVA): estimated peak concentrations     (Cmax)  - Part A: Pharmacokinetic (PK) parameters of lumacaftor (LUM) and ivacaftor (IVA): estimated trough concentrations     (Ctrough)  - Part B: Safety and Tolerability assessments as determined by number of subjects with adverse events (AEs) and     serious adverse events (SAEs) 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
Part A: up to 15 Days Part B: Baseline up to 28 days after last dose (up to 28 weeks) | 
 
 
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| E.5.2 | Secondary end point(s) | 
 - Part A: PK parameters of LUM and IVA metabolites: estimated peak concentrations (Cmax) of lumacaftor and ivacaftor metabolites   - Part A: PK parameters of LUM and IVA metabolites: estimated trough concentrations (Ctrough) of lumacaftor and ivacaftor metabolites  - Part A: Safety and Tolerability assessments as determined by number of subjects with adverse events (AEs) and serious adverse events (SAEs)   - Part B: Absolute change from baseline in sweat chloride level   - Part B: Absolute change from baseline in body mass index (BMI) and BMI for age z score 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
Part A: up to 15 days Part A (safety): up to 10 +/- 3 days after the last dose (up to 25 +/- 3 days) Part B: Week 24 | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  No  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  No  | 
| E.8.1.2 | Open |  Yes  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.3 | 
                                Will this trial be conducted at a single site globally?
                             |  No  | 
| E.8.4 |  Will this trial be conducted at multiple sites globally?  |  Yes  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  Yes  | 
| E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned | 
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| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 3 | 
| E.8.9.2 | In all countries concerned by the trial days | 26 |