This study presents a gene expression marker for recent thymic emigrants and shows variability increases with age: https://insight.jci.org/articles/view/93739/f

This study presents a gene expression marker for recent thymic emigrants and shows variability increases with age: https://insight.jci.org/articles/view/93739/figure/5 https://insight.jci.org/articles/view/93739/figure/5 A much older study with different markers shows something similar: https://www.pnas.org/doi/epdf/10.1073/pnas.070061597 https://www.pnas.org/doi/epdf/10.1073/pnas.070061597