CD8A and idiopathic pulmonary fibrosis: Conversely, three immunophenotypes were associated with increased IPF risk: EM CD8br %T cell (OR = 1.09, 95% CI = 1.03–1.16, p = 0.005), HVEM on T cell (OR = 1.06, 95% CI = 1.01–1.12, p = 0.021), and CD8 on TD CD8br (OR = 1.13, 95% CI = 1.02–1.24, p = 0.016).