SELL and adult-onset Still disease: Primarily, we identified main maturation Th subsets classified by CD45RA and CD62L co-expression (Figure 1A–D), and no significant differences were found in the ‘naïve’ (CD45RA+CD62L+), central memory (CD45RA–CD62L+), effector memory (CD45RA–CD62L–), or TEMRA (CD45RA+CD62L–) Th cell frequencies between patients with the AOSD and control groups.