Ezkiaga, H., Aurrekoetxea, J., Espada, M. and Ibarluzea, J. 2017. Smoking during pregnancy and subsequent attention-deficit/hyperactivity disorder in four year olds. Osagaiz: osasun-zientzien aldizkaria. 1, 2 (Dec. 2017). DOI:https://doi.org/10.26876/osagaiz.2.2017.96.