Fig. 5From: Clinical impact of tetracyclines and/or proton pump inhibitors on the efficacy of epidermal growth factor receptor inhibitors in non-small cell lung cancer: a retrospective cohort studyKaplan–Meier curves of PFS for TC + /PPI + and TC-/PPI-. PFS: progression-free survival, TC: tetracycline, PPI: proton pump inhibitorBack to article page