prov:value
| - Suspected sources of antigens include metals, e.g. cobalt, or additives and preservatives in foods, including benzoates, benzoic acid, cinnamaldehyde, metabisulfates, butylated hydroxyanisole, dodecyl gallate, tartrazine, or menthol,[4][6][8] Examples of foods which may contain these substances include margarine, cinnamon, eggs, chocolate or peppermint oil.[4][6][9]
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