Fig. 1From: The therapeutic effect of radiotherapy combined with systemic therapy compared to radiotherapy alone in patients with simple brain metastasis after first-line treatment of limited-stage small cell lung cancer: a retrospective studyKaplan–Meier survival curves of extracranial progression-free survival (ePFS) (A), overall survival (OS) (B), progression-free survival (PFS) (C), and intracranial progression-free survival (iPFS) (D) in the propensity score-matched datasetBack to article page