CD40LG and systemic sclerosis: For anti-CarP IgM levels, further exploration revealed differences between ATA positive and ATA/ACA negative SSc patients (ATA: 2944 aU/ml [2500; 5159] vs ATA/ACA negative: 2500 aU/ml [2500; 3280], p = 0.030) and between ACA positive and ATA/ACA negative SSc patients (ACA: 2713 aU/ml [2500; 4767] vs ATA/ACA negative: 2500 aU/ml [2500; 3280], p = 0.017).