Bourdin, Arnaud Asthma, COPD, and overlap in a national cohort: ACO on a gradient. [electronic resource] - The Journal of allergy and clinical immunology 04 2018 - 1516-1518 p. digital Publication Type: Letter; Research Support, Non-U.S. Gov't ISSN: 1097-6825 Standard No.: 10.1016/j.jaci.2017.11.049 doi Subjects--Topical Terms: Adrenal Cortex Hormones--therapeutic useAdultAsthma--diagnosisHumansPulmonary Disease, Chronic Obstructive--diagnosis