 Erythrocytes were incubated with different concentrations of DDS-NHOH (0.0; 0.0 and 0.0 μg/mL) for 0 h at 00°C. Data are reported as means ± S.E.M from three independent experiments done in triplicate. \*P \< 0.00 compared to methanol group.](pone.0000000.g000){#pone.0000000.g000}  Effect of RSV on methemoglobin formation induced by DDS-NHOH {#sec000} ------------------------------------------------------------  To evaluate the effect of R