CRP and dermatomyositis: Plasma Hsp90 outperformed serum CRP and CK levels in discriminating between IIM vs. HC (Supplementary Figure 1A), as well as between PM vs. HC (Supplementary Figure 1B) and DM vs. HC (Supplementary Figure 1C), as demonstrated by higher AUC, sensitivity, specificity, and odds ratio (Supplementary Table 3).