Fig. 1

Study population selection pathway. ^a Prematurity (≤ 37 weeks), low birth weight (≤ 2 kg), twin birth, cerebral atrophy, birth defects, or perinatal asphyxia. ^b Less than two Bayley evaluations, no dietary information during first and/or third trimester of pregnancy, maternal energy intake < 500 Kcal/day and no maternal serum DDE evaluation during the first trimester of pregnancy