[European Asthma and Allergy center in Davos].
D000293:Adolescent; D000531:Altitude; D001249:Asthma / Q000453:epidemiology / Q000451:nursing*; D002648:Child; D003430:Cross-Sectional Studies; D005858:Germany; D006782:Hospitals, Special / Q000458:organization & administration*; D006801:Humans; D006967:Hypersensitivity / Q000453:epidemiology / Q000451:nursing*; D009426:Netherlands; D013557:Switzerland