Circulating recent thymic emigrant T cells in patients with indolent B-cell malignancies compared with healthy donors. Left panel: Content of TCR excision circles in DNA extracted from isolated CD4⁺ T cells as measured by calibrated quantitative PCR. Right panel: Fraction of CD31⁺ cells within the circulating CD4⁺ T-cell compartment as measured by flow cytometry. FL/eMZL, n = 13; CLL, n = 8 patients.