Trebananib Active Not Recruiting Phase 2 Trials for Oligodendrogliomas / Adult Glioblastoma / Adult Giant Cell Glioblastoma / Adult Gliosarcoma / Gliosarcoma / Giant Cell Glioblastoma / Recurrent Brain Neoplasm / Glioblastomas / Recurrent Glioblastoma / Adult Oligodendroglioma / Recurrent Adult Brain Neoplasm / Adult Anaplastic Oligodendroglioma Treatment