Regidor et al. [13] reported that a time-dependent Hb level < 11.5 g/dL was associated with an increased risk of death in a 2-year cohort of 58,058 HD patients after adjustment for several risk factors including inflammation, nutritional parameters, and status of iron and medications (intravenous iron and ESA doses). This evidence concerns the gene GSTM1 and Huntington disease.