1. Department of Public Health, University of Eastern Finland, Kuopio, Finland;
2. Finnish Cancer Registry, Helsinki, Finland;
3. Department of Epidemiology, Finnish Cancer Registry, Helsinki, Finland;
4. Department of Clinical Chemistry, University of Helsinki, Helsinki, Finland;
5. Department of Biostatistics, Finnish Consulting Group, Helsinki, Finland;
6. Department of Pathology, Patolab Oy, Espoo, Finland