VWF assays in type 2 VWD subjects. Results for the VWF:Ag, VWF:RCo, and VWF:IbCo ELISA for 18 type 2A (●) and 11 type 2B subjects (○) enrolled in the ZPMCB-VWD. The line indicates the mean for each assay. All VWF:RCo values reported as less than 10 IU/dL are graphed at 10 IU/dL for visualization purposes.