1. Department of General Practice, Faculty of Medicine, Nantes, France2French National Institute of Health and Medical Research, INSERM U1232 - Team 2, Nantes, France
2. Association in charge of colorectal cancer screening program, CAPSANTE 44, Nantes, France
3. Department of General Practice, Faculty of Medicine, Nantes, France
4. Association in charge of colorectal cancer screening program, AUDACE, La Roche sur Yon, France
5. French Health Insurance System, Division of Nantes, Nantes, France
6. Cancer registry for Loire-Atlantique and Vendée geographic areas, Nantes, France
7. Department of Epidemiology and Biostatistics, Nantes University Hospital, Nantes, France
8. French National Institute of Health and Medical Research, INSERM U1232 - Team 2, Nantes, France7Department of Epidemiology and Biostatistics, Nantes University Hospital, Nantes, France