How does your facility measure factor VIII during HEMLIBRA therapy?

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One-stage PTT-based FVIII assay
17% (5 votes)
Two-stage chromogenic FVIII assay
45% (13 votes)
PTT-based assay calibrated to emicizumab
10% (3 votes)
There is no reliable assay
28% (8 votes)
Total votes: 29