University of Oslo, Vilnius University, Hospital Universitario Virgen Macarena, University of Oslo - Oslo University Hospital, University of Oslo - Oslo University Hospital, Hospital Universitario Virgen Macarena, National Hellenic Research Foundation, National Hellenic Research Foundation, University of Oslo - Oslo University Hospital, affiliation not provided to SSRN, Croatian Institute of Public Health - Croatian National Cancer Registry, Biosistemak Institute for Health Systems Research and University of Oslo - Center for Bioinformatics