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FACS analyses of the number of circulating CD4+CXCR5+ TFH cells; (a) Flow cytometry analysis of TFH cells; (b) the numbers of CD4+CXCR5+ T cells, ICOS+, PD-1+, or IL-21+ TFH cells and the concentrations of serum IL-21 in the four groups patients with pre- and post-transplantation for 4 and 12 weeks, respectively.
