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Keeling D, Davidson S, Watson H; Haemostasis and Thrombosis Task Force of the British Committee for Standards in Haematology.Keeling D, et al. Among authors: davidson s.Br J Haematol. 2006 May;133(3):259-69. doi: 10.1111/j.1365-2141.2006.06018.x.Br J Haematol. 2006.PMID: 16643427Free article.