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Title
Posters.
Abstract
Prior to the introduction of new allergen extracts it is now necessary that adequate biological standardization takes place. The Nordic Guidelines for Registration of Allergen Preparations indicate what might be essential for the quality of in-vivo diagnostic extracts which have not undergone any allergenic modifications. Purification by gel filtration of two major IgE-binding antigens of Dactylis glomerata pollen extract will be described.