GSTM1 and hemolysis: In all, results from this study and others (Ahmadizad and El-Sayed, 2005; Ahmadizad et al., 2006; Cakir-Atabek et al., 2009) suggest that any transient RT-induced hemolysis is of a smaller influence than PV decrease, resulting in a net increase in Hct and Hb 0 h after one or multiple bouts of RT.