1Cancer Epidemiology Group, Centre for Epidemiology and Biostatistics, University of Leeds, Arthington House, Cookridge Hospital, Leeds, UK
2Pathology & Tumour Biology, Leeds Institute for Molecular Medicine, University of Leeds, St James’s University Hospital, Leeds, UK
3Northern & Yorkshire Cancer Registry and Information Service, Arthington House, Cookridge Hospital, Leeds, UK
4National Cancer Services Analysis Team, Clatterbridge Centre for Oncology, Bebington, Wirral, UK
Correspondence to: Dr E Morris, NYCRIS, Level 6, Bexley Wing, St James’s Institute of Oncology, St James’s Hospital, Leeds LS9 7TF, UK; [email protected]