S Testa, G Morstabilini, A Fattorini, L Galli, N Denti and A D’Angelo (2002) “Discrepant sensitivity of thromboplastin reagents to clotting factor levels explored by the prothrombin time in patients on stable oral anticoagulant treatment: impact on the international normalized ratio system”, Haematologica. Pavia, Italy, 87(12), pp. 1265-1273. Available at: https://haematologica.org/article/view/2578 (Accessed: 8September2026).