1. Section of Environmental Health; Department of Public Health; University of Copenhagen; Copenhagen Denmark
2. Department of Public Health; Centre for Arctic Health & Unit of Cellular and Molecular Toxicology; University of Aarhus; Aarhus Denmark
3. Department of Environmental Medicine; Institute of Public Health; University of Southern Denmark; Odense Denmark
4. Department of Public Health; The Research Unit for General Practice and Section of General Practice; University of Copenhagen; Copenhagen Denmark