DE VRIES, A A factor in serum which accelerates the conversion of prothrombin to thrombin; its determination and some physiologic and biochemical properties. [electronic resource] - Blood Mar 1949 - 247-58 p. digital Publication Type: Journal Article ISSN: 0006-4971 Subjects--Topical Terms: Blood Physiological PhenomenaHemostaticsHumansProthrombinSerumThrombin