Quantitative assessment of TRECs after BMT in patients who received CD4⁺ DLI.

Lines at each time point represent the median number of TREC copies per 100 000 CD3⁺ cells. Data points on the x-axis represent samples without detectable TREC copies. The limit of the sensitivity of the assay is 100 copies per 100 000 CD3⁺ cells.