van der Valk, P G M The natural history of chronic urticaria and angioedema in patients visiting a tertiary referral centre. [electronic resource] - The British journal of dermatology Jan 2002 - 110-3 p. digital Publication Type: Journal Article ISSN: 0007-0963 Standard No.: 10.1046/j.1365-2133.2002.04582.x doi Subjects--Topical Terms: AdultAngioedema--diagnosisChronic DiseaseDisease ProgressionFemaleHumansMalePrognosisProportional Hazards ModelsRetrospective StudiesSurvival AnalysisUrticaria--diagnosis