title: Variability of skin tests.
mesh_terms: D000485:Allergens; D002986:Clinical Trials as Topic; D005069:Evaluation Studies as Topic; D006801:Humans; D007201:Indicator Dilution Techniques; D010936:Plant Extracts; D011058:Pollen; D012107:Research Design; D006255:Rhinitis, Allergic, Seasonal / Q000175:diagnosis; D012882:Skin Tests
chemical_list: D000485:Allergens; D010936:Plant Extracts