Corrigendum: Mifepristone as a Potential Therapy to Reduce Angiogenesis and P-Glycoprotein Associated With Glioblastoma Resistance to Temozolomide - Llaguno-Munive, Monserrat; León-Zetina, Sebastián; Vazquez-Lopez, Inés; Ramos-Godinez, María del Pilar; Medina, Luis A.; Garcia-Lopez, Patricia (Frontiers in Oncology, 2021)