Inflammatory markers of autoimmune diseases, including antinuclear antibodies (ANA), anti-dsDNA, rheumatoid factor (RF), SSA-SSB antibodies, complement (C3), and antineutrophil cytoplasmic antibodies (ANCA), were identified in the EHRs of 2104 participants of the 25,984 participants tested for these inflammatory markers in MyCode®. The gene discussed is C3; the disease is autoimmune disease.