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One‐to‐one correspondence of the density of CD8+ tumor‐infiltrating lymphocytes (TILs) at pretreatment biopsy and at the surface of the tumor in post‐treatment resected specimens from patients with locally advanced rectal cancer treated with neoadjuvant therapy. Changes in the density of CD8+ TILs in all patients (A) responders (i.e. pathological response grade 1b‐3) (B), and non‐responders (i.e. pathological response grade 0‐1a) (C)
