Molecular genetic analysis in mild hyperhomocysteinemia: a common mutation in the methylenetetrahydrofolate reductase gene is a genetic risk factor for cardiovascular disease. - Kluijtmans,L.A.; van den Heuvel,L.P.; Boers,G.H.; Frost,P.; Stevens,E.M.; van Oost,B.A.; den Heijer,M.; Trijbels,F.J.; Rozen,R.; Blom,H.J. (Am J Hum Genet, 1996)