Modeling Physiologic Microenvironments in Three-Dimensional Microtumors Maintains Brain Tumor Initiating Cells Ashley N. Gilbert, Kiera Walker, Anh Nhat Tran, Nathaniel H. Boyd,G. Yancey Gillespie, Raj K. Singh, and Anita B. HjelmelandJournal of Cancer Stem Cell Research 2017, 5:e1004 (July 13, 2017) Full Text > PDF > XML > Supplemental Data >