 SAN DIEGO, July 13, 2021 GLOBE NEWSWIRE -- Exagen Inc. Nasdaq: XGN, a leading provider of autoimmune testing solutions, announced today the publication of their latest clinical utility study in Lupus Science Medicine, found here: This multi-center study demonstrated that the AVISE Lupus test helped increase confidence in ruling-in and ruling-out systemic lupus erythematosus SLE in patients suspected of this disease and informed appropriate treatment decisions. 