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. 2016 Sep 20;65(3):253–261. doi: 10.1007/s00005-016-0425-7

Fig. 1.

Fig. 1

Gender differences in the prevalence of positive skin tests. Wheal reactions with a mean diameter of 3 mm or more were regarded as positive if the control solutions showed the expected results (wheal size of at least 3 mm for the positive control and of less than 3 mm for the negative control)