CXCR5 and type 1 diabetes mellitus: Next, we analyzed the expression of 18 surface markers reported to be differentially expressed by cTfh and cTph cells in previous studies [4, 15, 16, 22] on CXCR5−PD‐1hi cTph, CXCR5+PD‐1hi cTfh, as well as CXCR5−PD‐1lo and CXCR5+PD‐1lo cells from children with T1D, AAb+ children and healthy controls.