CD40LG and systemic sclerosis: For SSc, the median level of anti-CarP IgG was 404 aU/mL (IQR: 277; 588), of anti-CarP IgM 2510 aU/mL (IQR: 2500; 4063) and of anti-CarP IgA 478 aU/mL (IQR: 317; 737) (Fig. 1 and Table 1).