Factor V Leiden (G1691A), the prothrombin 3’-untranslated region variant (G20210A) and thermolabile methylenetetrahydrofolate reductase (C677T): A single genetic test genotypes all three loci-determination of frequancies in the S. Wales population of the UK - Bowen, DJ; Bowley, S; John, M; Collins, PW (Thromb Haemost, 1998)