LCN2 and systemic sclerosis: We did not find significant difference (p > 0.05) in NGAL serum level between SSc patients after Iloprost infusion, both at t1 (15.1 ± 2.3 pg/ml) and t2 (15.5 ± 1.9 pg/ml), and HC (14.5 ± 1.7 pg/ml).