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Every article on Frontiers is peer reviewed, permanently archived and free to read.

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Original Research
Published 12 October 2026
Serum SPP1 levels are associated with disease severity and 1-year mortality in primary Sjögren’s syndrome-associated interstitial lung disease
Yuting Li · Shenao Zhang · Xiaorui Ding · Qing Wang · Tong Ji · Hong Yao · Jinghong Dai
Frontiers in Immunology
doi 10.3389/fimmu.2026.1959993