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2. Urticaria and angio-oedema: a review of 544 patients;Champion;Br J Dermatol,1969
3. Reason for encounter- and episode- and process-oriented standard output from the Transition Project. Parts 1 and 2;Lamberts,1991
4. Urticaria: then and now;Champion;Br J Dermatol,1988
5. Pseudoallergen-free diet in the treatment of chronic urticaria: a prospective study;Zuberbier;Acta Derm Venereol,1995