Analysis of PD-1/PD-L1 variations in lung cancer and association with immunotherapeutic efficacy and prognosis: A nonrandomized controlled trial Jun Ma; JianRui Song; LiNa Han; Wen Zhou; LiFeng Meng; JianHui Li; XiaoMing Bai;

Efficacy and safety of sorafenib in elderly patients with advanced hepatocellular carcinoma Guilherme Nader Marta; Leonardo G. da Fonseca; Maria Ignez Braghiroli; Fernando Moura; Paulo M. Hoff; Jorge Sabbaga;