Increased IL-18 in patients with systemic lupus erythematosus: relations with Th-1, Th-2, pro-inflammatory cytokines and disease activity. IL-18 is a marker of disease activity but does not correlate with pro-inflammatory cytokines. - Amerio,P.; Frezzolini,A.; Abeni,D.; Teofoli,P.; Girardelli,C.R.; De Pita,O.; Puddu,P. (Clin Exp Rheumatol, 2002)