Severe hemophilia A (VIII < 0.01 IU/mL)
Peak historical inhibitor ≥ 5 BU/mL and ≤ 200 BU/mL
Starting titer ≤ 10 BU/mL before randomization
Titer declines to < 10 BU in < 12 mo (< 24 mo from 2006)
Age < 8 years at time of randomization
Local and/or central review board approval
Written informed consent
Ability and willingness of subject to comply with the protocol