What method do you use to measure von Willebrand factor activity?

Primary tabs

Ristocetin cofactor (VWF:RCo)
60% (32 votes)
Collagen binding assay (VWF:CB)
8% (4 votes)
VWF activity immunoassay (VWF:Act)
23% (12 votes)
Ristoectin-triggered recombinant GP Ib immunoassay (VWF:GPIbR)
4% (2 votes)
Non-ristocetin gain of function GP Ib immunoassay (VWF:GPIbM)
6% (3 votes)
Total votes: 53