title: The occurrence of symptoms of possibly chronic airway diseases in toddlers. A three-year follow-up study and a double-blind trial to establish the influence of an anti-allergic maintainance medication.
mesh_terms: D000367:Age Factors; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003371:Cough / Q000453:epidemiology; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008173:Lung Diseases, Obstructive / Q000188:drug therapy / Q000453:epidemiology*; D009426:Netherlands; D010919:Placebos; D011398:Promethazine / Q000627:therapeutic use; D012737:Sex Factors
chemical_list: D010919:Placebos; D011398:Promethazine