1. Centre for Epidemiology, National Board of Health and
Welfare, SE-106 30 Stockholm, Sweden, gudrun.persson@sos.se
2. Centre for Epidemiology, National Board of Health and
Welfare, SE-106 30 Stockholm, Sweden
3. University of Göteborg, Department of Social Medicine,
Vasa hospital, SE. 411 33 Göteborg, Sweden
4. Stockholm Gerontology Research Center, Box 6401, S-113
82 Stockholm, Sweden
5. Institute of Gerontology, University College of Health
Sciences, Box 1038, SE-551 11 Jönköping, Sweden
6. National Board of Health and Welfare, SE-106 30 Stockholm,
Sweden
7. National Institute of Public Health, SE-103 52 Stockholm,
Sweden