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(A) Causes of death in 54 asthma patients classified by degree of airflow limitation. (B) Causes of death in 33 ACOS patients classified by degree of airflow limitation.
Abbreviations: ACOS, asthma–COPD overlap syndrome; COPD, chronic obstructive pulmonary disease; CVD, cardiovascular disease; FEV1, forced expiratory volume in one second.
