CYT107 did not have a significant effect on thymic output in most patients. (A) Absolute CD4⁺ and CD8⁺ RTE counts, identified by the CD4⁺CD45RA⁺CD31⁺CD62L^bright CD95^dim and CD8⁺CD103⁺CD62L^brightCD95^dim phenotypes for individual patients. (B) CD4⁺ and CD8⁺ TRECs are shown for individual patients in each cohort.