Figure 4.

Correlation between CD140b and CD73 and erythropoietin secretion. The rates of positive cells were determined by the above gating strategy (A–C). The correlation between the rate of CD73⁺ cells and EPO concentration is shown in (D). The correlation between the rate of CD140b⁺ cells and EPO concentration is shown in (E). The correlation between the rate of CD140b⁺ CD73⁺ cells and EPO concentration is shown in (F). The P‐values were determined by Spearman's tests.