ADGRE2 and autosomal dominant vibratory urticaria: The so‐called vibratory angioedema, that in some cases is caused by a mutation in the mucin‐like hormone receptor‐like receptor 2 (EMR2), which contains an epidermal growth factor‐like module and is encoded by the ADGRE2 gene, is a special form of hereditary angioedema that is not (yet) classified as HAE.22, 23