College of American Pathologists Conference XXXI on laboratory monitoring of anticoagulant therapy. Laboratory monitoring of oral anticoagulant therapy - Fairweather, RB; Ansell, J; van den Besselaar, AMHP; Brandt, JT; Bussey, HI; Poller, I; Triplett, DA; White, RH (Arch Pathol Lab Med, 1998)