1. Department of Infectious Disease Epidemiology and Modelling; Norwegian Institute of Public Health; Oslo Norway
2. Department of Health Management and Health Economics; University of Oslo; Oslo Norway
3. Department of Infectious Diseases; Akershus University Hospital; Lørenskog Norway
4. Division of Medicine and Laboratory Sciences; University of Oslo; Oslo Norway
5. Department of Alcohol, Tobacco and Drugs; Norwegian Institute of Public Health; Oslo Norway
6. Department of Tuberculosis, Blood Borne and Sexually Transmitted Infections; Norwegian Institute of Public Health; Oslo Norway