1 Department of Gastroenterological Oncology, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland; Department of Cancer Prevention, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland; Department of Gastroenterology, Hepatology and Oncology, Medical Center for Postgraduate Education, Warsaw, Poland; Department of Health Management and Health Economy, University of Oslo, Oslo, Norway. Electronic address: mfkaminski@coi.waw.pl.
2 Department of Health Management and Health Economy, University of Oslo, Oslo, Norway; Department of Transplantation Medicine and KG Jebsen Centre for Colorectal Cancer, Oslo University Hospital, Oslo, Norway.