GSTP1 and neoplasm: According to our results, the high level of GSTP1 in a tumor biopsy is associated with low efficiency of CP NAC scheme, compared with the group of patients with a low level of expression and objective response to treatment (median: 0.29; percentile 25–75%: 0.07–0.51 versus median: 0.04; percentile 25–75%: 0.00–1.12, p = 0.05), (Figure 1F).