GSTM1 and nutritional deficiency disease: In a recent longitudinal study by Galler et al. [25], it was found that previously malnourished children, who exhibited low Hb levels, among other signs of malnutrition, showed higher parent-reported levels of aggression toward peers at ages 9–15 years than at 11–17 years, independent of baseline age, sex, household standard of living, and maternal depressive symptoms.