NTF3 and systemic sclerosis: Disease-modifying drugs, except hydroxychloroquine did not affect serum NTs levels; NT-3 levels were higher in SSc patients with than without (4555.6±3933.3 vs 2474.5±2031.6 pg/mL, p = 0.05) hydroxychloroquine, an immuno-modulative drug prescribed for severe articular manifestations in 80% of the cases.