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Low genomic alterations in nine blood samples from ESCC patients identified by using cnvPartition. Across autosomes 1−22, regions with CNAs are indicated with colored bars as follows: regions with copy number = 0–0.5 (red), 0.5–1.5 (orange), 1.5–2.5 (CNNLOH, green), 2.5–3.5 (blue), and 3.5–4.5 (purple). Patient ID was listed below each sample. CNA, copy number alteration.
