1. Department of Medical Epidemiology and Biostatistics, and
2. Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
3. Center for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
4. Astrid Lindgren Children’s Hospital, Karolinska University Hospital, Stockholm, Sweden
5. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
6. Center for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden