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;

Association between ventilatory settings and pneumothorax in extremely preterm neonates Felipe Y. Matsushita; Vera L.J. Krebs; Werther B. de Carvalho;