| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated |  | 
| E.1.1.1 | Medical condition in easily understood language |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Virus Diseases [C02] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| The primary objective for this study is to  analyse the impact of inhibition of viral replication by interferon-free therapy consisting of Sofosbuvir and Daclatasvir (±Ribavirin) on the phenotype and function of the innate immune cells and HCV-specific T-cells, in treatment-naive or previously relapsed chronic hepatitis C patients with GT-1, -3 or -4 infection. 
 |  | 
| E.2.2 | Secondary objectives of the trial | 
| -	To evaluate if a shortened treatment duration of 12 weeks with Sofosbuvir and Daclatasvir (±Ribavirin) also results in high sustained virological response rates in subjects infected with HCV genotype 3 and 4; -	Evaluation of:
 o	Rapid viral response (RVR) rates on-treatment with SOF + DCV ± RBV;
 o	SVR 4 and -24 rates on-treatment with SOF + DCV ± RBV
 -	Evaluation of tolerability and safety as measured by the frequency of discontinuations due to adverse events (AEs) and serious adverse events (SAEs).
 
 |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| 1.	Signed written informed consent -	Willingness to sign the written ICF.
 2.	Target population
 -	Previous documentation of positive HCV serology (HCV antibody or HCV RNA) at least 24 weeks prior to enrollment to study, OR Positive HCV serology (HCV antibody or HCV RNA) with a prior remote risk factor (more than 24 weeks prior to Screening) for the acquisition of hepatitis C.
 -	Subjects infected with HCV genotype 1, 3 or 4 on screening laboratory test OR previous availaible documentation of HCV genotype 1,3 or 4 genotype.
 -	Treatment-naïve to or relapsed after IFN-alpha based therapies (including first generation PI failures). Relapse is defined as the recurrence of HCV RNA following the termination of a full course of treatment and after having achieved an undetectable HCV RNA during treatment.
 3.	Age and reproductive status
 -	Age: 18 - 65 years
 -	Subjects must agree to use birth control (condoms) from the time of dosing until 90 days after the follow-up visit; male or female patients who are surgically sterile need not to employ a method of contraception
 4.	Laboratory test findings
 -	Screening hematology, clinical chemistries, coagulation and urinalysis are not clinically significant and the following criteria are met:
 o	Platelets >50x109/L
 o	Total white blood cells >3.0x109/L and absolute neutrophil count >1.5x109/L
 o	Hemoglobin >6.8 mmol/L for females and >7.4 mmol/L for males
 o	Total and direct bilirubin < 2 x ULN
 o	ALT < 10 x ULN
 o	Serum creatinine within normal limits and estimated creatinine clearance rate as calculated by the Cockcroft-Gault formula >50 mL/min
 -	Negative results on the following screening laboratory tests: HBsAg and HIV antibody OR previous availaible documentation within 1 year before screening of HBsAg and HIV antibody negativity.
 
 |  | 
| E.4 | Principal exclusion criteria | 
| -	Other known cause of liver disease except for CHC -	History or symptoms of decompensated liver disease: Child-Pugh Class B or C, including ascites, hepatic encephalopathy, esophageal variceal bleeding, or other signs of hepatic insufficiency or portal hypertension
 -	History of hepatocellular carcinoma
 -	Concurrent clinically significant medical diagnosis (other than hepatitis C-related conditions) that would potentially interfere with the subjects study compliance or confound study results
 -	History of relevant drug and/or food allergies
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| -	Immune response o	Baseline versus end-of-treatment versus follow-up
 o	Patients with SVR versus patients with non-SVR
 o	Patients with genotype 1 versus 3 versus 4
 
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| During and after therapy. |  | 
| E.5.2 | Secondary end point(s) | 
| -	SVR12 in the study population -	Proportion of patients with HCV RNA < LLOD at 4 and 24 weeks after cessation of therapy
 -	Proportion of patients with HCV RNA < LLOD at week 4 during treatment
 -	Any AE leading to discontinuation of the study drug
 
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| During and after therapy. |  | 
| 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 | No | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| 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 | Yes | 
| E.6.13.1 | Other scope of the trial description |  | 
| 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.8.2.4 | Number of treatment arms in the trial | 3 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 3 | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| 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 |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 2 | 
| E.8.9.1 | In the Member State concerned months | 1 | 
| E.8.9.1 | In the Member State concerned days | 0 |