IL4 and psoriasis: To determine whether Mo-MDSC-associated immune factors are associated with different psoriasis TCM syndrome groups, we analyzed levels of serum iNOS, Arg-1, NO concentration, and cytokine levels (IL-2, IL-4, IL-6, IL-10, IL-17A, TNF-α, and IFN-γ) in healthy controls, the psoriatic BS syndrome group, and the psoriatic BH syndrome group.