VWF and COVID-19: Tissue factor, the key regulator of extrinsic coagulation cascade signaling, could be the most promising drug targets for COVID‐19‐associated coagulopathies, whereas coagulation factor VWF (von Willebrand factor) and ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13) may be related to the incidence of severe COVID‐19.125, 126