CD4 and systemic sclerosis: The MFI of IFN-γ and IL-2 was similar in CD4+ T cells from anti-Scl-70 positive and negative SSc patients (IFN-γ; 312.4 ± 54.29 vs 285.60±56.27 and IL-2; 314.70±76.34 vs 285.60±56.27).