ADAMTS13 and thrombotic thrombocytopenic purpura: Addressing a deficiency of von Willebrand factor, a mouse model of A disintegrin and metalloprotease with thrombospondin 13 (ADAMTS13) deficiency (a cause of congenital thrombotic thrombocytopenic purpura) was corrected with intravenously delivered LV‐ADAMTS13, achieving sustained ADAMTS13 expression and correction of prothrombotic phenotypes.68