Median PFS times were 5.4 months ( 95 % CI , 4.2 to 5.7 months ) in arm A ( n = 47 ) , 8.3 months ( 95 % CI , 4.2 to 10.8 months ) in arm B ( n = 44 ) , and 7.3 months ( 95 % CI , 4.6 to 10.8 months ) in arm C ( n = 47 ) .