HSPA5 and pulmonary emphysema: According to the Shapiro-Wilk (S-W) and Levene tests, the corresponding statistical method for each continuous variable (age, gender, BMI, smoking history, smoking cessation, FEV1%pred, RV%pred, RV/TLC%, CT emphysema%, FETUB, fibrinogen or GRP-78) was used to identify the discrepancy between study groups listed in Table S2.