ABCG2 is a potential marker of tumor-initiating cells in breast cancer - Sicchieri, Renata Danielle; Silveira, William Abraham da; Mandarano, Larissa Raquel Mouro; Oliveira, Tatiane Mendes Gonçalves de; Carrara, Helio Humberto Angotti; Muglia, Valdair Francisco; Andrade, Jurandyr Moreira de; Tiezzi, Daniel Guimarães (Tumor Biology, 2015)