While Sjögren's syndrome (SS) is more common than related autoimmune disorders, such as systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA), scientific and medical research in SS has lagged behind significantly. This is especially true in the field of SS genetics, where efforts to date have relied heavily on candidate gene approaches. Within the last decade, the advent of the genome-wide association (GWA) scan has altered our understanding of disease pathogenesis in hundreds of disorders through the successful identification of novel risk loci.
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