D3 phosphoinositides and outside-in integrin signaling by GP IIb/IIIa mediate platelet actin assembly and filopodial extension induced by phorbol 1,2-myristate 1,3-acetate - Hartwig, J; Kung, S; Kovacsovics, T; Janmey, P; Cantley, L; Stossel, T; Toker, A (J Biol Chem, 1996)