CXCR5 and type 1 diabetes mellitus: Interestingly, the frequency of CXCR5−PD-1hi Tph cells was only increased in children with type 1 diabetes who were positive for two or more autoantibodies (Fig. 2e), a phenomenon that was also observed in CXCR5+PD-1hi Tfh cells (ESM Fig. 2 and [11]).