Cloning and expression of a cDNA coding for the anticoagulant hirudin from the bloodsucking leech, Hirudo medicinalis - Harvey, RP; Degryse, E; Stéfani, L; Schamber, F; Cazinave, J-P; Courtney, M; Tolstoshev, P; Lecocq, J-P (Proc Natl Acad Sci, 1986)