E. Couto, R. Barini, M. L. Nomura, J. M. Annichino-Bizzacchi, and J. L. P. e Silva, “Methylene tetrahydrofolate reductase gene mutation together with anticardiolipin antibody during pregnancy: a case report”, Sao Paulo Med J, vol. 120, no. 5, pp. 152–153, Sep. 2002.