The Use of Tissue Thromboplastins of Different Origin Is a Fundamental Tool in the Initial Characterization of FVII Defects On “Factor VII Deficiency (Semin Thromb Hemost 2009;35(4):400–406)” - Girolami, Antonio; Scandellari, Raffaella; Lombardi, A.M. (Seminars in Thrombosis and Hemostasis, 2010)