RT Journal Article SR Electronic T1 Guidelines on oral anticoagulation: second edition. British Society for Haematology. British Committee for Standards in Haematology. Haemostasis and Thrombosis Task Force. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 177 OP 183 DO 10.1136/jcp.43.3.177 VO 43 IS 3 YR 1990 UL http://jcp.bmj.com/content/43/3/177.abstract AB