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CXCR3+ cells in lymphoid follicles correlate with FEV1. Scatterplot showing individual results of percentage of CXCR3+ follicular cells versus FEV1% predicted. Solid circles: smokers without COPD; inverted open triangles: GOLD 1–2; solid triangles: GOLD 3–4. FEV1 was inversely related (2nd order polynomial) to percentage of CXCR3+ cells (r = 0.60).
