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Spearman’s rank order correlation analysis between rheumatoid arthritis (RA) clinical parameters and percentages of mucin 1 (MUC1) positive cells in lining layer (a) and sublining layer (b) of RA synovium. Histological changes were assessed according to the Krenn synovitis scoring system. JE, joint erosion; JSN, joint space narrowing; mTSS, modified total Sharp score assessed by Sharp/van der Heijde modified method.
