1. Institute of Environmental Medicine; Unit of Epidemiology; Karolinska Institutet; Stockholm Sweden
2. Centre for Occupational and Environmental Medicine; Stockholm County Council; Stockholm Sweden
3. Department of Epidemiology, Biostatistics and Biodemography; Max Planck Odense Center on the Biodemography of Aging; University of Southern Denmark; Odense Denmark
4. Max Planck Institute for Demographic Research; Rostock Germany
5. Department of Sociology & Demography; University of Rostock; Rostock Germany