1. Department of Health Sciences and Health Policy, University of Lucerne, Lucerne, Switzerland.
2. Cancer Registry Zurich and Zug, Institute of Surgical Pathology, University Hospital Zurich and Epidemiology, Biostatistics and Prevention Institute, University Zurich, Zurich, Switzerland.
3. Department of Health and Social Affairs, Division of Health, Canton Argovia, Arau, Switzerland.
4. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.