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. 2021 May 21;21:174. doi: 10.1186/s12890-021-01537-z

Fig. 1.

Fig. 1

Changes in lung function with preoperative LAMA/LABA therapy. a Changes in forced expiratory volume in 1s (FEV1). b Changes in percentage of predicted FEV1 (FEV1%pred). c Improvement in FEV1 by severity of airflow limitation (AFL)