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Elevated levels of faecal calprotectin in primary Sjögren’s syndrome. Faecal calprotectin levels were higher in patients with primary Sjögren’s syndrome (n = 56) than in healthy control subjects (n = 29) (p = 0.002 by Mann–Whitney U test). Subjects with a concomitant organic gastrointestinal (GI) disease are indicated by closed triangles; other subjects are represented by open circles
