Metabolic effects of C677T and A1298C mutations at the MTHFR gene in Brazilian children with neural tube defects - Cunha, Andréa Luciana Araújo da; Hirata, Mario Hiroyuki; Kim, Chong A.; Guerra-Shinohara, Elvira Maria; Nonoyama, Kymio; Hirata, Rosario Dominguez Crespo (Clinica Chimica Acta, 2002)