GSR and edema: AO, antioxidants; HACE, high-altitude cerebral edema; GSH, glutathione; GSSG, glutathione disulfide; NADPH, nicotinamide adenine dinucleotide phosphate; GR, glutathione reductase; Lipid-OOH, lipid peroxide; Lipid-OH, lipid alcohol; H2O2, hydrogen peroxide; SOD, superoxide dismutase; O2, oxygen.