Update README.md

README.md

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-license: mit
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+Dataset structure
+
+This dataset contains the LUAD data snapshot used for FORESEE evaluation.
+
+Files:
+- tcga_type_all_clean.csv: cleaned LUAD clinical table, including patient ID, survival time, survival status, and matched sample information.
+- tcga_type_rna.csv: RNA-seq features matched to patient/sample IDs.
+- tcga_type_cnv.csv: CNV features matched to patient/sample IDs.
+- tcga_type_mut.csv: mutation features matched to patient/sample IDs.
+
+Data leakage check:
+We checked patient-level overlap between the training cohort and this evaluation cohort using TCGA patient barcodes/case IDs and sample IDs. No overlapping patients were identified.
+
+Usage:
+These files are provided to reproduce the LUAD evaluation and to verify the exact patient-level data snapshot used in the study.
+