1. Olson J, Arkin C, Brandt J, Cunningham M, Giles A, Koepke J, Witte D (1998) College of American Pathologists conference XXXI on laboratory monitoring of anticoagulant therapy: laboratory monitoring of unfractionated heparin therapy. Arch Pathol Lab Med 122:782–798
2. Laffan M, Manning R (2001) Laboratory control of anticoagulant, thrombolytic and anti-platelet therapy (Chapter 18). In: Lewis S, Bain B, Bates I (eds) Dacie and Lewis: practical haematology, 9th edn. Churchill Livingstone, London, pp 465–479
3. Levine M, Hirsh J, Gent M, Turpie A, Cruisckshank M, Weitz J, Anderson D, Johnson M (1994) A randomized trial comparing activated thromboplastin time with heparin assay in patients with acute venous thromboembolism requiring large daily doses of heparin. Arch Intern Med 154:49–56
4. Hirsh J, Raschke R (2004) Heparin and low-molecular-weight heparin. Chest 126: 188S–203S
5. Monagle P, Barnes C, Ignjatovic V, Furmedge J, Newall F, Chan A, DeRosa L, Hamilton S, Ragg P, Robinson S, Auldist A, Crock C, Rowlands S (2006) Developmental haemostasis: Impact for clinical haemostasis laboratories. Thromb Haemost 95:362–372