BDNF and memory impairment: Following the same selection criteria adopted in our previous study, these four new chemicals were selected based on: (i) their proven association with cognitive/learning and memory impairment in children described in epidemiological studies; (ii) their mode of action, considering their effects on synaptogenesis (possibly occurring as consequence of BDNF signalling alteration); (iii) their heterogeneous chemical classification; and (iv) their detection in human samples (Supplementary Table S1).