Comparison of first-line chemotherapy based on irinotecan or other drugs to treat non-small cell lung cancer in stage IIIB/IV: a systematic review and meta-analysis. - Xue-Qin Yang; Chong-Yi Li; Ming-Fang Xu; Hong Zhao; Dong Wang; Yang, Xue-Qin; Li, Chong-Yi; Xu, Ming-Fang; Zhao, Hong; Wang, Dong (BMC Cancer, 2015)