PTPN22 and latent autoimmune diabetes in adults: A non-HLA genes related to GADA, the -1123G>C promoter polymorphism of the protein tyrosine phosphatase non-receptor type 22 gene (PTPN22), was associated with LADA in the Chinese population (32), and C1858T of PTPN22 was associated with LADA in the Caucasian population (33).