Canc Registry Norway, Dept Colorectal Canc Screening, POB 5313 Majorstuen, N-0304 Oslo, Norway|Telemark Hosp, Skien, Norway

Canc Registry Norway, Dept Colorectal Canc Screening, POB 5313 Majorstuen, N-0304 Oslo, Norway|European Inst Oncol, Div Epidemiol & Biostat, Milan, Italy

Canc Registry Norway, Dept Colorectal Canc Screening, POB 5313 Majorstuen, N-0304 Oslo, Norway

Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway|Oslo Univ Hosp, Dept Transplantat Med, KG Jebsen Ctr Colorectal Canc Res, Oslo, Norway

Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway|Harvard Sch Publ Hlth, Dept Epidemiol, Boston, MA USA

Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway|Sorlandet Hosp, Kristiansand, Norway

Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway|Oslo Univ Hosp, Dept Transplantat Med, KG Jebsen Ctr Colorectal Canc Res, Oslo, Norway|Harvard Sch Publ Hlth, Dept Epidemiol, Boston, MA USA

Canc Registry Norway, Dept Colorectal Canc Screening, POB 5313 Majorstuen, N-0304 Oslo, Norway|Telemark Hosp, Skien, Norway|Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway|Oslo Univ Hosp, Dept Transplantat Med, KG Jebsen Ctr Colorectal Canc Res, Oslo, Norway