1. Institut National de la Santé et de la Recherche médicale‐Unité 953 Recherche épidémiologique en santé périnatale et santé des femmes et des enfants—INSERM, UMR S953 Epidemiological Research Unit on Perinatal Health and Women’s and Children’s Health, UPMC University Paris, Paris, France
2. Netherlands Organization for Applied Scientific Research TNO, Leiden, the Netherlands
3. National Institute for Health and Welfare, Helsinki, Finland and Nordic School of Public Health, Gothenburg, Sweden
4. Department of Obstetrics and Gynaecology, Division of Perinatology, University Medical Centre, Ljubljana, Slovenia
5. Leiter der Abteilung für Epidemiologie Zentrum für Public Health der Med. Univ. Wien, Austria
6. Department of Epidemiology National Research Institute of Mother and Child, Warsaw, Poland