GSTM1 and psoriasis: Moreover, subjects with hematologic disorders, hemoglobin (Hb) levels < 120 g/L in women and < 130 g/L in men, malnutrition, atrial fibrillation, heart failure, acute venous thromboembolism, malignancy, immunodeficiencies, active infections, inflammatory diseases other than psoriasis, hepatic or renal disease, and pregnant women were excluded.