Patel, Jignesh P More on normal prothrombin times in the presence of therapeutic levels of rivaroxaban--early experience from King's College Hospital. [electronic resource] - British journal of haematology Sep 2013 - 717-8 p. digital Publication Type: Letter; Comment ISSN: 1365-2141 Standard No.: 10.1111/bjh.12423 doi Subjects--Topical Terms: Anticoagulants--bloodHumansMorpholines--bloodThiophenes--bloodVenous Thrombosis--blood