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Cover image: Expression of doublecortin, a microtubule associated protein expressed in differentiating neurons in brain of neonatal rats. The image is from a study that evaluated fetal-neonatal iron deficiency and sufficiency on neural development and long-term learning, by Tran et al., on page 2495 in this issue (J. Nutr. 138: 2495–2501, 2008). Doublecortin is shown in green and NeuN, a nuclear neuronal marker, is shown in red. Used with permission by Michael Georgieff.