1. Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland;
2. Industrial Management and Engineering, Aalto-yliopisto Tuotantotalouden laitos, Aalto, Finland;
3. Nordic Healthcare Group Ltd, Helsinki, Finland;
4. Cancer Society of Finland, Helsinki, Finland;
5. Surgical Department, Central Finland Central Hospital, Jyväskylä, Finland;
6. Department of Sport and Health Science, University of Jyväskylä, Jyväskylä, Finland;
7. Department of Oncology, Helsinki University Central Hospital, Helsinki, Finland