1. European Centre for Register-Based Health-Related Population
Research - Public Health, Major Diseases and Welfare (ECREPH), National
Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark,
lct@niph.dk
2. European Centre for Register-Based Health-Related Population
Research - Public Health, Major Diseases and Welfare (ECREPH), National
Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark