Fig. 5From: A systematic review and meta-analysis of Liuzijue in stable patients with chronic obstructive pulmonary diseaseMeta-analysis of the effect of Liuzijue on lung function: a FEV1; b FEV1%pred; c FEV1/FVC%. Abbreviations: FEV1, forced expiratory volume in one second; FEV1%pred, the percentage of predicted values of FEV1; FEV1/ FVC%, FEV1/FVC ratioBack to article page