Maternal ferritin levels during pregnancy and ADHD symptoms in 4-year-old children: Results from the INMA–infancia y medio ambiente (environment and childhood) prospective birth cohort study Egileak: Santa-Marina L.; Lertxundi N.; Andiarena A.; Irizar A.; Sunyer J.; Molinuevo A.; Llop S.; Julvez J.; Beneito A.; Ibarluzea J.; Imaz L.; Ferrin M. Urtea: 2020 Aldizkaria: International Journal of Environmental Research and Public Health Liburukia: 17 Hasierako orria - Amaierako orria: 1 - 17 ISBN/ISSN: 16617827 DOI: 10.3390/ijerph17217704