Addition of thoracic radiotherapy to a PD-L1 inhibitor plus chemotherapy regimen delays brain metastasis onset in extensive-stage small cell lung cancer patients without baseline brain metastasis.Huang B, Liu S, Wang K, et al. Respir Res. 2025 Mar 5;26(1):85. doi: 10.1186/s12931-025-03157-1. PMID: 4…