Relationship of plasma ADAMTS13 inhibitor to ADAMTS13:AC and VWF:Ag in AH and ALF patients on admission. Patients with the inhibitor reported (A) lower ADAMTS13:AC and (B) higher VWF:Ag than those without the inhibitor. Data are expressed as means ± standard deviation. P<0.05 as indicated. ADAMTS13:AC, ADAM metalloproteinase with thrombospondin type-1 motif, member 13 activity; VWF, von Willebrand factor; Ag, antigen; AH, acute hepatitis; ALF, acute liver failure.