[1] Canc Res UK, Stat Informat Team, London EC1V 4AD, England
[2] Publ Hlth England, Knowledge & Intelligence Team East Midlands, Sheffield S10 3TG, S Yorkshire, England
[3] NHS Natl Serv Scotland, Informat Serv Div, Edinburgh EH12 9EB, Midlothian, Scotland
[4] Glenfield Gen Hosp, Dept Resp Med, Leicester LE3 9QP, Leics, England
[5] Publ Hlth England, Natl Canc Intelligence Network, London SE1 8UG, England
[6] Royal Coll Physicians, London NW1 4LE, England