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CD47 and PD-L1 expression rates on circulating tumor cells (CTCs) of BC patients. Frequency of distinct CTC subsets among patients with early, recurrent, and de novo metastatic BC. Percentage of patients with CTCs presenting (A) CD47 or CD47high expression, (B) PD-L1 or PD-L1high expression, (C) CD47 and PD-L1 co-expression, and (D) CD47high and PD-L1high co-expression.
