The Mutation C677T in the Methylene Tetrahydrofolate Reductase Gene as a Risk Factor for Myocardial Infarction in the Portuguese Population - Ferrer-Antunes, C.; Palmeiro, A.; Morais, J.; Lourenço, M.; Freitas, M.; Providência, L. (Thrombosis and Haemostasis, 1998)