1. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
2. Department of Obstetrics and Gynecology, West China Second University Hospital Sichuan University Chengdu China
3. NTNU Trondheim Norway
4. International Agency for Research on Cancer Lyon France
5. Department of Psychiatry Ichan School of Medicine at Mount Sinai New York New York USA
6. Seaver Autism Center for Research and Treatment at Mount Sinai New York New York USA