RRM1 and glioblastoma: The multivariate models showed that high levels of AGTRAP and of RRM1 significantly predicted the shorter OS of GBM patients (AGTRAP: HR = 1.814, 95% CI = 1.260–2.612, p = 0.001; RRM1: HR = 1.746, 95% CI = 1.099–2.775, p = 0.018).