Shear-induced platelet aggregation can be mediated by vWF released from platelets, as well as by exogenous large or unusually large vWF multimers, requires adenosine diphosphate, and is resistant to aspirin - Moake, J L; Turner, N A; Stathopoulos, N A; Nolasco, L H; Hellums, J D (Blood, 1988)