PASI = psoriasis area severity index; WBC = white blood cell; RBC = red blood cell; Hb = haemoglobin; MCV = mean corpuscular volume; MCH = mean corpuscular hemoglobin; MCHC = mean corpuscular hemoglobin concentration; PLT = platelet; MPV = mean platelet volüme; PCT = plateletcrit; PDW = platelet distribution width; RDW = red cell distribution width; NLR = neutrophil to lymphocyte ratio; MLR = monocyte to lymphocyte ratio; PLR = platelet to lymphocyte ratio; C-reactive protein = CRP; ESR = erythrocyte sedimentation rate. This evidence concerns the gene GSTM1 and psoriasis.