title: Chronic urticaria: a mystery.
authors.affiliation: Department of Dermatology, Milan, Italy. paolopigatto@libero.it
authors.forename: P D
authors.initials: PD
authors.lastname: Pigatto
authors.forename: R H
authors.initials: RH
authors.lastname: Valsecchi
mesh_terms: D000328:Adult; D000485:Allergens / Q000009:adverse effects*; D002908:Chronic Disease; D004311:Double-Blind Method; D005260:Female; D005502:Food / Q000009:adverse effects; D005503:Food Additives / Q000009:adverse effects; D006801:Humans; D007239:Infections / Q000150:complications; D008297:Male; D008875:Middle Aged; D012882:Skin Tests; D014581:Urticaria / Q000175:diagnosis / Q000209:etiology* / Q000276:immunology
chemical_list: D000485:Allergens; D005503:Food Additives