Fig. 3From: Efficacy and safety of particle therapy for inoperable stage II-III non-small cell lung cancer: a systematic review and meta-analysisMeta-analysis of the 2-year progression-free survival (PFS): (a) 2-year PFS, overall; (b) 2-year PFS, subgroup analysis stratified by treatment type. Abbreviations: PBT, proton beam therapy; CIRT, carbon-ion radiotherapy; CC, concurrent chemotherapyBack to article page