TY - RPRT TI - Rapid assay for von Willebrand factor activity using formalin-fixed platelets and microtitration technic. AU - R Ramsey AU - B L Evatt PY - 1979 DO - 10.1093/ajcp/72.6.996 UR - https://pubmed.ncbi.nlm.nih.gov/316281/ ID - 316281 ER -