1. Centre for Research in Environmental Epidemiology (CREAL) (E.S.-G., M.Ga., M.Gu., J.S.), Barcelona, 08003 Spain
2. Department of Experimental and Health Sciences (E.S.-G., M.Ga., M.Gu., J.S.), Universitat Pompeu Fabra, Barcelona, 08003 Spain
3. Learning Disabilities Unit (UTAE) (E.S.-G.), Neuropediatrics Department, Hospital Sant Joan de Déu, Universitat de Barcelona, Barcelona, Spain
4. Centro Investigación en red (CIBER) Epidemiología y Salud Pública (E.S.-G., M.Ga., M.Gu., J.S.), Barcelona, Spain
5. ISGlobal (M.Ga., J.S.), Barcelona Centre for International Health Research, Hospital Clínic- Universitat de Barcelona, Barcelona, 08950 Spain
6. Department of Child and Adolescent Psychiatry/Psychology (M.Gu.), Erasmus University Medical Centre–Sophia Children's Hospital, Rotterdam, 3015 The Netherlands
7. Hospital del Mar Medical Research Institute (J.S.), Barcelona, 08003 Spain