1. Department of Public Health Sciences Karolinska Institutet Stockholm Sweden
2. Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
3. Department of Public Health and General Practice Faculty of Medicine Norwegian University of Science and Technology Trondheim Norway
4. Regional Center for Health Care Improvement St.Olav's Hospital Trondheim Norway
5. Department of Epidemiology Institute of Social Medicine Rio de Janeiro Brasil
6. Center for Epidemiology and Community Medicine Stockholm County Council Stockholm Sweden
7. Department of Medicine Beth Israel Deaconess Medical Center Boston MA USA