title: A comparison of sodium cromoglycate nasal solution and powder in hay fever.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002986:Clinical Trials as Topic; D004205:Cromolyn Sodium / Q000008:administration & dosage* / Q000627:therapeutic use; D004341:Drug Evaluation; D006801:Humans; D008875:Middle Aged; D010919:Placebos; D011058:Pollen / Q000032:analysis; D011208:Powders; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*; D012996:Solutions
chemical_list: D010919:Placebos; D011208:Powders; D012996:Solutions; D004205:Cromolyn Sodium