1. Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
2. Department of Women's and Children's Health; Uppsala University Hospital; Uppsala Sweden
3. Department of Paediatrics; Central Hospital; Skövde Sweden
4. Department of Clinical Science and Education; Södersjukhuset; Karolinska Institutet; Stockholm Sweden
5. Sachs' Children's Hospital; Södersjukhuset; Stockholm Sweden
6. Centre for Occupational and Environmental Medicine; Stockholm County Council; Stockholm Sweden