The G20210A mutation of the prothrombin gene in patients with previous first episodes of deep-vein thrombosis: prevalence and association with factor G1691 A, mefliylenetetrahydrofolate reductase C677T and plasma prothrombin levels - Cattaneo, M; Chantarangkul, V; Taioli, E; Santos, JH; Tagliabue, L (Thromb Res, 1999)