Blann, A Ethnic background is a determinant of average warfarin dose required to maintain the INR between 3.0 and 4.5. [electronic resource] - Journal of thrombosis and haemostasis : JTH Mar 2004 - 525-6 p. digital Publication Type: Letter ISSN: 1538-7933 Standard No.: 10.1111/j.1538-7933.2003.00620.x doi Subjects--Topical Terms: Administration, OralAnticoagulants--administration & dosageEthnicityHumansInternational Normalized Ratio--methodsWarfarin--administration & dosage