Von willebrand factor plasma levels were measured with rocket electrophoresis in 120 normal men(blood group O=30,A=30,B=30,AB=30)to determine whether there was significant difference in each of the ABO blood groups.

• 用火箭电泳法检测了120名正常健康男性（其中A，B，O，AB型各30人）的血浆vWF：Ag（血管性假血友病因子）含量，以判断是否存在有A，B，O血型间的差异。