GSTM1 and anemia: These 5 above-mentioned pathophysiological conditions before the IS event have been described in literature and can be elaborated further:A rise in the erythrocyte indexes B.RDW.CV and B.RDW.SD and ferritin levels with lowering trends in B.Hb, B.Hct, and B.RBC values before IS diagnosis indicate early hidden anemia.