Cloning and expression of cDNA coding for the anticoagulant hirudin from the bloodsucking leech, Hirudo medicinalis - Harvey, R P; Degryse, E; Stefani, L; Schamber, F; Cazenave, J-P; Courteney, M; Tolstoshev, P; Lecocq, J-P (Proc Natl Acad Sci USA, 1986)