PTPRN and type 1 diabetes mellitus: Among the associated T1D-tested auto-antibodies, 79.7% of cases had at least one positive auto-Ab, 42.4% had positive anti-GAD65 Ab, 36.2% had positive anti-ZnT8 Ab, 31.9% had positive anti-Insulin Ab, and 28% had anti-IA2 Ab.