IL13RA2 and glioblastoma: Since its discovery, IL-13RA2 has been used as a target for GBM in more than 30 different experimental, preclinical, and clinical therapies, making it one of the most well-studied and promising targets for GBM [10,11,17,18,23,43,44,45,46,47,48,49,50,51,52,53,54,55].