Lumbar centroid level subcutaneous fat volume increased performance of prognostic predictive model in digestive system cancers: a real-world cohort study. - Zheng L; Zhang JL; Wu LL; Shao RJ; Ye XX; Li WC; Zhang L; Zhang YY; Zhang FM; Ye YH; Le XW; Zhang T; et al. (Journal of gastrointestinal oncology, 2025)