CRP level in the COPD group was significantly higher (0.39 ng/mL, P < 0.05) than that of the control group (0.22 ng/mL), but significantly lower than that of the AECOPD group (0.48 ng/mL, P < 0.05), while the CRP level decreased significantly in the MXF/STL group (0.37 ng/mL, P < 0.05) and the TMS/FS group (0.27 ng/mL, P < 0.01), compared to the AECOPD group (Figure 1(d), S2). Here, CRP is linked to chronic obstructive pulmonary disease.