American Indians Have a Higher Risk of Sjögren's Syndrome and More Disease Activity Than European Americans and African Americans. - Scofield RH; Sharma R; Pezant N; Kelly JA; Radfar L; Lewis DM; Kaufman CE; Cioli S; Harris J; Grundahl K; Rhodus NL; Wallace DJ; et al. (Arthritis care & research, 2020)