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(a) The purity of RNA isolates from five sample types (FFPE tumour tissue, adjacent normal tissue‐derived sEVs, tumour tissue‐derived sEVs, plasma sEVs, urine sEVs) were measured by Nanodrop absorbance 260/280 ratio. Sequencing results were measured by valid reads (%) (b) and reads coverage (c), based on sample types. Sequencing results were also PCA‐plotted based on sample type (d), library batch (e), and sequencing batch (f).
