[1] Publ Hlth England, Hlth Protect & Med Directorate, London SE1 8UG, England
[2] Univ Coll London Hosp Canc Collaborat, Ctr Canc Outcomes, London NW1 2BU, England
[3] Univ Leicester, Glenfield Hosp, Leicester LE3 9QP, Leics, England
[4] Publ Hlth England, Natl Canc Registrat & Anal Serv, London, England
[5] Addenbrookes Hosp, Cambridge CB2 0QQ, England
[6] Publ Hlth England, London SE1 8UG, England