0012146 Abnormality of von Willebrand factor
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0030131 Abnormal von Willebrand factor multimer distribution
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0030132 Absence of large von Willibrand factor multimers
0030133 Abnormal presence of ultra-large von Willebrand factor multimers
0030134 Total absence von Willebrand factor multimers
0030135 Absence of intermediate von Willibrand factor multimers
0040225 Decrease in high molecular weight von Willebrand factor Multimers