EPO and anemia (phenotype): Of note is that in the BOC trial, SVR rates in patients managed by RBV dose reduction alone were comparable to those in patients managed with erythropoietin therapy.23 Similarly, in the TVR trials, dose reduction of RBV had no effect on SVR rates, and therefore dose reduction should be the initial response to management of anemia.24 Because the duration of BOC therapy (24 to 44 weeks) is longer than the duration of TVR therapy (12 weeks), the frequency of anemia is likely to be greater in BOC-containing regimens, leading to more RBV dose reductions and consideration of erythropoietin use.