1. Cancer Survival Group Department of Non‐Communicable Disease Epidemiology London School of Hygiene & Tropical Medicine Keppel Street London WC1E 7HT UK
2. Centre for Health Services Studies University of Kent Canterbury CT2 7NF UK
3. Division of Cancer Prevention and Control Centers for Disease Control and Prevention Atlanta GA 30333 USA
4. Montana Central Tumor Registry Chronic Disease Prevention and Health Promotion Bureau PO Box 202951, 1400 Broadway Helena MT 59620‐2951 USA
5. Bureau of Cancer Epidemiology New York State Cancer Registry New York State Department of Health 150 Broadway Albany NY 12204‐2719 USA
6. New Hampshire State Cancer Registry Norris Cotton Cancer Center, and Department of Epidemiology Geisel School of Medicine Dartmouth College Dartmouth‐Hitchcock Medical Center One Medical Center Drive Lebanon NH 03756 USA
7. Cancer Division University College London Hospitals NHS Foundation Trust 250 Euston Road London NW1 2PG UK