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Box plot of the concentrations of malondialdehyde (MDA-Hb) (a) and reduced glutathione (GSH) (b) in the first 6 weeks of life, in 83 very low birth weight infants with (n = 17) or without (n = 66) a composite index of severe morbidity (ISM). Values shown are median levels (25th/75th box; 10th/90th error bars).
