Molecular genetic analysis in mild hyperhomocysteinemia: a common mutation in the methylenetetrahydrofolate reductase gene is a genetic risk factor for cardiovascular disease - Kluijtmans, LA; van den Heuvel, LP; Boers, GH; Frosst, P; Stevens, EM; van Oost, BA; den Heijer, M; Trijbels, FJ; Rozen, R; Blom, HJ (Am J Human Gen, 1996)