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Poller, L; Ibrahim, S; Keown, M; Pattison, A; Jespersen, J (2011). The prothrombin time/international normalized ratio (PT/INR) Line: derivation of local INR with commercial thromboplastins and coagulometers--two independent studies. Journal of thrombosis and haemostasis, 9(1), pp. 140-8. Oxford: Wiley-Blackwell 10.1111/j.1538-7836.2010.04109.x
