From the simulations (n=160 in each condition), we found a median of 754 CD8+ T cells/mm2 (95% CI, 748–763) and 106 fibrocytes/mm2 (95% CI, 101–108) in the control situation, and 1187 CD8+ T cells/mm2 (95% CI, 1169–1195) and 212 fibrocytes/mm2 (95% CI, 206–216) in the COPD situation. The gene discussed is CD8A; the disease is chronic obstructive pulmonary disease.