Correlation of a common mutation in the methylenetetrahydrofolate reductase gene with plasma homocysteine in patients with premature coronary artery disease - Christensen, B; Frosst, P; Lussier-Cacan, S; Selhub, J; Goyette, P; Rosenblatt, DS; Genest, J; Rozen, R (Arterioscler Thromb Vasc Biol, 1997)