Human Cell Line-derived Recombinant Factor VIII (Human-cl-rhFVIII) in Previously Untreated Patients

Investigate the inhibitor development rate of Human cl rhFVIII in previously untreated patients with severe Hemophilia A.

Inclusion Criteria:

* Male patients
* Severe Hemophilia A (FVIII:C \<1%)
* No previous treatment with FVIII concentrates or other blood products containing FVIII

Exclusion Criteria:

* Diagnosis with a coagulation disorder other than Hemophilia A
* Severe liver or kidney disease
* Concomitant treatment with any systemic immunosuppressive drug