Rates of undetectable HCV-RNA at week 4 were significantly higher on 180 g ( 15/102 , 15 % GT1 ,4 ; 22/29 , 76 % GT2 ,3 ) and 240 g ( 17/104 , 16 % GT1 ,4 ; 20/30 , 67 % GT2 ,3 ) Lambda than alfa ( 6/103 , 6 % GT1 ,4 ; 9/30 , 30 % GT2 ,3 ) .