Serum concentration of soluble tumour necrosis factor-like weak inducer of apoptosis (sTWEAK) in patients with systemic sclerosis (SSc) and controls. Concentration of sTWEAK in the sera of all SSc patients (SSc), SSc patients with short-term disease (defined as not longer than 3 years in diffuse SSc and not longer than 5 years in limited SSc), those with longer disease duration and healthy controls. Closed circles represent values in individual subjects, bars represent the mean values of the groups, and horizontal lines the appropriate SDs. NS, not significant.
Kowal-Bielecka et al. Arthritis Research & Therapy 2013 15:R69 doi:10.1186/ar4246