Biselli, Joice Matos, Daniela Brumati, Vivian Fernanda Frigeri, Bruna Lancia Zampieri, Eny Maria Goloni-Bertollo, and Érika Cristina Pavarino-Bertelli. 2008. “A80G Polymorphism of Reduced Folate Carrier 1 (RFC1) and C776G Polymorphism of Transcobalamin 2 (TC2) Genes in Down’s Syndrome Etiology”. São Paulo Medical Journal 126 (6):329-32. https://periodicosapm.emnuvens.com.br/spmj/article/view/2029.