1. Quick J (1935) The prothrombin time in haemophilia and in obstructive jaundice. J Biol Chem 109:74–74
2. Cohen AJ, Kessler CM (2002) Haemophilia A and B. In: Kitchens CS, Alving BM, Kessler CM (eds) Consultative hemostasis and thrombosis. WB Saunders, Philadelphia, pp 43–56
3. Roberts HR, Escobar MA (2002) Less common congenital disorders of hemostasis. In: Kitchen S, Alving BM, Kessler CM (eds) Consultative haemostasis and thrombosis. WB Saunders, Philadelphia, pp 57–71
4. Triplett DA (2002) Coagulation abnormalities. In: McClatchey KD (ed) Clinical laboratory medicine, 2nd edn. Lippincott Williams and Wilkins, Philadelphia, pp 1033–1049
5. Haemostasis (1985) ICSH/ISTH recommendations for reporting prothrombin time in oral anticoagulant control. J clin pathol 38:133–134