Quantitative PCR analysis of the expression profile of genes related to multiple drug resistance in tumors of the central nervous system - Valera, Elvis Terci; Lucio-Eterovic, Agda Karina Brodoloni; Neder, Luciano; Scrideli, Carlos Alberto; Machado, Hélio Rubens; Carlotti Júnior, Carlos Gilberto; Queiroz, Rosane Gomes de Paula; Motta, Fabio José do Nascimento; Tone, Luiz Gonzaga (Journal of Neurooncology, 2007)