title: Allergic rhinitis and air pollution: a double-blind crossover analysis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000397:Air Pollution; D001966:Bromine / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D004809:Ephedrine / Q000627:therapeutic use*; D005260:Female; D006634:Histamine H1 Antagonists / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008744:Methylamines / Q000627:therapeutic use; D008875:Middle Aged; D014663:Nasal Decongestants / Q000627:therapeutic use*; D011725:Pyridines / Q000627:therapeutic use*; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D013997:Time Factors
chemical_list: D006634:Histamine H1 Antagonists; D008744:Methylamines; D014663:Nasal Decongestants; D011725:Pyridines; D004809:Ephedrine; D001966:Bromine