Plasma VWF levels in selected inbred strains and CASA/RkJ intercrossed animals. VWF levels were calculated as a percentage of the CASA/RkJ strain, which is arbitrarily defined as 100%. The RIIIS/J, SWR/J, and DDK strains all share the low Mvwf1 allele (Galgt2 mutation).14 Average VWF levels for each pure strain (□ and ▪) as well as F1 animals resulting from CASA/RkJ intercrosses (▦) are shown (± SD, standard deviation).