Cuproptosis-associated PDHA1 promotes sarcoma progression and immunotherapy responsiveness via the E2F1-PD-L1 axis: a multi-omics and clinical validation study. - Qin H; Qi T; Yao N; Sheng W; Deng J; Qian J; Wang D; Zeng H; Weng J; Yang J; Yu F (NPJ precision oncology, 2026)