However, unlike CD4+ T cells within the lungs, the proportion of CXCR3+ CD4+ T cells was higher in IPF LLNs (13.60%; range, 5.80–26.90%) compared to controls (6.43%; range, 1.00–15.40%; p = 0.036). Here, CXCR3 is linked to idiopathic pulmonary fibrosis.