Hypermethylation of CpG island in the promoter region of CALCA in acute lymphoblastic leukemia with central nervous system(CNS) infiltration correlates with poorer prognosis - Paixão, Valéria A.; Vidal, Daniel O.; Caballero, Otavia L.; Vettore, André L.; Tone, Luiz Gonzaga; Ribeiro, Karina Braga; Lopes, Luiz Fernando (Leukemia Research, 2006)