We did not observe altered frequencies of infiltrating hematopoietic CD45+ cells, including CD8+ T cells (Fig. 6A and B), CD4+ T cells, CD4+/Foxp3+ regulatory T cells (Tregs), NK-p46 natural killer cells, T-cell receptor (TCR)γδ T cells or neutrophils (Fig. S6A–D), between KC and 4KC pancreata. Here, CD4 is linked to keratoconus.