Charles Stiller has been a member of Childhood Cancer Research Group since 1976 and is now Senior Research Fellow and Director of the National Registry of Childhood Tumours. He has been involved in descriptive epidemiology of childhood cancer, studies of outcome for children and young people with cancer in relation to patterns of organization of medical care, and studies of genetic factors in relation to aetiology of childhood cancer. Mr Stiller has been a member of the UK Children's Cancer Study Group (about to be renamed Children's Cancer and Leukaemia Group following merger) since 1984