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. Author manuscript; available in PMC: 2022 Feb 11.
Published in final edited form as: AAPS PharmSciTech. 2021 Feb 11;22(2):71. doi: 10.1208/s12249-021-01928-9

Figure 1.

Figure 1.

Timeline showing the various treatment strategies for GBM employed over the past several decades.

1 combination of chemotherapy and radiation, 2 WHO develops universal system for classifying brain tumors, 3 mapping the genome of glioblastoma (28), 4 FDA approval: the treatment of recurrent GBM (29, 30) and 5 TTFs have been approved (29, 30).