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Kaplan‐Meier estimated progression‐free survival (PFS) curves by biomarker status. (A): PFS by treatment arm in the biomarker population. (B): PFS by HRG status in the control arm patients. (C): PFS by treatment arms for the HRG‐positive patients. (D): PFS by treatment arm for the HRG‐negative patients.
Abbreviations: E, erlotinib arm; HRG, heregulin; S+E, seribantumab + erlotinib arm.
