High RDW values were reported to be significantly associated with elevated high-sensitivity CRP levels and erythrocyte sedimentation rates—two frequently used markers of inflammation—in unselected inpatients; moreover, high RDW values might indicate selenium deficiency, which can lead to reduced glutathione peroxidase activity in RBCs and can thus engender erythrocyte deformity [39]. The gene discussed is CRP; the disease is selenium deficiency.