The role of proaccelerin in human blood coagulation. Evidence that proaccelerin is converted to a prothrombin-converting principle by activated Stuart factor: With notes on the anticoagulant action of soybean, trypsin inhibitor, protamine sulfate and hexadimethrine bromide - Breckenridge, R. T; Ratnojf, O. D (J. clin. Invest., 1965)