IL17A and skin reaction: In our study, the correlations between the Peak SCC and the skin test were higher at the 24 h than at the 48 h reading (Table 3): this may suggest that the 24 h reading was more related to the production of IL-17A than the later reading, and as this also applied to the Peak SCC, that the mechanism underlying mASR was more related to the early phase of the skin reaction.