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A, Relationship between the distribution of plasma CD3+ and PFS in the HER2‐positive group; B, Relationship between the distribution of plasma CD4+ and PFS in the HER2‐positive group; C, Relationship between the distribution of plasma CD3+ and OS in the HER2‐positive group; D, Relationship between the distribution of plasma CD4+ and OS in the HER2‐positive group
