Double-blind placebo-controlled peroral challenges in patients with delayed-type allergy to balsam of Peru.


Patch tests (PTs) with spices, such as clove, cinnamon, Jamaica pepper and vanillin sugar, and with balsam of Peru were made on 29 patients 0.8-2.9 years after an allergy to balsam of Peru had been detected. Positive reactions to balsam of Peru were seen in 17 patients, and to clove, Jamaica pepper or cinnamon in 5. Double-blind placebo-controlled peroral… (More)


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