Persson Gudrun, Danielsson Maria, Rosén Måns, Alexanderson Kristina, Lundberg Olle, Lundgren Bernt, Stenbeck Magnus, Wall Stig
Centre for Epidemiology, National Board of Health and Welfare, Stockholm, Sweden.
Scand J Public Health Suppl. 2006 Jun;67:3-10. doi: 10.1080/14034950600677360.