1. Tees Bowel Cancer Screening Centre, University Hospital of North Tees, Stockton-on-Tees, UK
2. South of Tyne Bowel Cancer Screening Centre, South Tyneside District Hospital, South Shields, UK
3. Epidemiology Unit, Richard Doll Building, Oxford, UK
4. Cancer Screening Evaluation Unit, Institute of Cancer Research, University of London, Sutton, London, UK
5. NHS Cancer Screening Programmes, Sheffield, UK
6. Institute of Health and Society, Newcastle University, Newcastle-upon-Tyne, UK