Frequency of Factor V (FV) Leiden and C677T Methylenetetrahydrofolate Reductase (MTHFR) Mutations in Colombians - Vanegas, Olga Camacho; Giusti, Betti; Fernandez, Carlos Martin Restrepo; Abbate, Rosanna; Pepe, Guglielmina (Thrombosis and Haemostasis, 1998)