We previously identified a quantitative trait locus (QTL) for AIP on mouse chromosome 2 that overlapped with QTLs for CD4+/CD44high and CD8+/CD44high memory T-cells, FoxP3+/CD4+ and FoxP3+/CD8+ regulatory T-cells, and CD8+/CD69+ cytotoxic T-cells. Here, FOXP3 is linked to autoimmune pancreatitis.