Protein Phosphatase 2A Mediates Dormancy of Glioblastoma Multiforme-Derived Tumor Stem-Like Cells during Hypoxia. - Hofstetter, Christoph P.; Burkhardt, Jan-Karl; Shin, Benjamin J.; Gürsel, Demirkan B.; Mubita, Lynn; Gorrepati, Ramana; Brennan, Cameron; Holland, Eric C.; Boockvar, John A. (PLoS ONE, 2012)