[Combination of asthma and COPD--more common than assumed?].
Bauer
Karl-Heinz
KH
D001249:Asthma / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications* / Q000453:epidemiology