Serum Levels of TNF-α, IFN-γ, IL-6, IL-8, IL-12, IL-17, and IL-18 in Patients With Active Psoriasis and Correlation With Disease Severity - Arican, Ozer; Aral, Murat; Sasmaz, Sezai; Ciragil, Pinar (Mediators of Inflammation, 2005)