1. Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
2. CIBER Epidemiología y Salud Pública (CIBERESP), Spain
3. Department of Maternal-Fetal Medicine, ICGON (Institut Clínic d’Obstetrícia, Ginecologia i Neonatologia), Hospital Clinic-IDIBAPS (Institut d’Investigacions Biomèdiques Agustí Pi i Sunyer), University of Barcelona, Barcelona, Spain
4. Institute for Risk Assessment Sciences, Division Environmental Epidemiology, Utrecht University, Utrecht, the Netherlands
5. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands