EGFR and glioblastoma: EGFR expression evaluated by immunohistochemistry using a group of primary GBM specimens from 61 patients (Table 2) showed a trend toward a negative association with survival (p = 0.074), which was marginally correlated only in younger patients (less than the median age of 53 years; p = 0.037, hazard ratio = 1.819, 95% CI 1.036–3.195) but not in the old ones (p = 0.875), consistent with the previous finding [7].