1. Institute of Environmental Medicine, Division of Metals and Health, Karolinska Institutet, Stockholm, Sweden
2. Department of Occupational and Environmental Medicine, University Hospital, Lund, Sweden
3. Department of Clinical Chemistry, Karolinska University Hospital, Huddinge, Sweden
4. Department of Community Health, Malmö University Hospital, Malmö, Sweden
5. Department of Medicine, and
6. Department of Gynecology and Obstetrics, University Hospital, Lund, Sweden