MMP2 and type 1 diabetes mellitus: The only significant correlations with the duration of diabetes were found for MMP2 (T1D: r = 0.23, P < 1 × 10−5; MA: r = 0.33, P < 0.01) and sTNFR2 (T1D: r = 0.17, P < 1 × 10−3) (Tables S2 and S3 in Supplementary Material).