Other gene polymorphisms, interleukin-2 receptor alpha (IL2RA), forkhead box P3 (FOXP3), thyroglobulin (TG), CD25, CD40, CLEC16A, and FCRL3, among others, have been found to contribute to both thyroid autoimmunity and type 1 diabetes (Frommer and Kahaly, 2021[42]). This evidence concerns the gene FOXP3 and autoimmune thyroid disease.