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 study. - Gao, Xinyu; Liu, Tingting; Fan, Min; Sun, Hongfu; Zhou, Shixuan; Zhou, Yuxin; Zhu, Haolin; Zhang, Ru; Li, Zhanyuan; Huang, Wei (World Journal of Surgical Oncology, 2024)