1. Department of Public Health, Aarhus University, Aarhus, Denmark
2. Social & Health Services and Labour Market, DEFACTUM, Aarhus, Denmark
3. Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark
4. Department of Health Management and Health Economics, University of Oslo, Oslo, Norway
5. Department of Oncology, Aarhus University Hospital, Aarhus University, Aarhus, Denmark
6. School of Medicine, University of Colorado, Denver, CO, United States of America