CD19 and psoriasis: We evaluated the ratios of CD19+ B cells in peripheral bloodmononuclear cells (PBMCs) from 157 patients with psoriasis (65 patients withpsoriasis vulgaris, 32 patients with erythrodermic psoriasis, 30 patients witharthropathic psoriasis, and 30 patients with pustular psoriasis) and 35 healthycontrols (HCs).