<qa>  What is the main selection criteria for patients with chronic hepatitis C related to genotyp5. Main selection criteria Patients with chronic hepatitis C related to genotype 1 or 4 virus and for which a combination therapy is needed will be eligible. Patients with co-infection either VHB or VIH or with concomitant treatments expected to interact with the endpoints hemoglobin, viral load, serum ribavirin will be excluded. 