Anti-FcεR1a mAb immunostaining and immunofluorescent co-staining together with an anti-Ki67 rabbit polyclonal antibody of AAA lesion sections from Apoe−/−Fcer1a−/− recipient mice receiving donor CD8+ T cells from Apoe−/− mice showed the presence of donor CD8+ T cells in AAA lesions (Supplementary Fig S8B and S9A, left two panels) and these donor cells also underwent clonal expansion (Supplementary Fig S9B). This evidence concerns the gene MKI67 and triple-A syndrome.