Fig. 3
From: Right- and left-sided colorectal cancers respond differently to cetuximab
Kaplan–Meier survival estimates of metastatic colorectal cancer patients treated with chemotherapy alone. a, PFS curves of patients who received first-line therapy. b, OS curves of patients who received first-line therapy. c, PFS curves of patients who received second-line therapy. d, OS curves of patients who received second-line therapy