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The clinical spectrum of the systemic connective tissue diseases. Abbreviations: APS: antiphospholipid syndrome, SLE: systemic lupus erythematosus, DM: dermatomyositis, RA: rheumatoid arthritis, SS: Sjögren’s syndrome, PM: polymyositis, ASyS: antisynthetase syndrome, sIBM: sporadic inclusion body myositis, SSc: systemic sclerosis.
