Multimeric analysis of plasma vWF in SDS-1% agarose gel. Equal amounts of vWF (0.0025 U vWF:Ag) from plasma samples of the patient and from NHP were applied on top of the gel. Days of plasma collection and the platelet counts on the respective days are shown beneath the immunoblot of the electrophoretic gel. The arrow (↕) denotes the unusually large vWF multimers.