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Overall survival (OS) of all patients treated with and without bevacizumab (a); OS of patients grouped by primary tumor location in chemotherapy (CT) group (b); OS of patients grouped by primary tumor location in chemotherapy plus bevacizumab (CT + B) group (c); OS of patients in CT group and CT + B in patients with right-side colon cancer (d), left-side colon cancer (e) and rectal cancer (f).
