title: Concentrations of patch test allergens: are we comparing the same things?
abstract: A new way of expressing the concentrations of patch test allergens solutions (or emulsions) is proposed. From these new expressions it can be seen that apparently similar concentrations (0.5% chromium, 2% formaldehyde) can actually be in the ratio 1 to 15 as expressed at the molecular level.
mesh_terms: D000485:Allergens / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004342:Drug Hypersensitivity / Q000175:diagnosis; D006801:Humans; D010328:Patch Tests / Q000379:methods*; D012882:Skin Tests / Q000379:methods*
chemical_list: D000485:Allergens