The researchers used forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) as a percentage of predicted value (FVCPP) as indicators of lung function.

• 研究者用用力第一秒呼气量(FEV1)和用力肺活量(FVC)和其预期值的百分比(FVCPP)作为肺功能衡量指标。