1. CEReSS—Health Service Research and Quality of Life Center Aix‐Marseille Univ. Marseille France
2. Department of Epidemiology and Health Economics APHM Marseille France
3. Department of Medical Information APHM Marseille France
4. Department of Adult Oncology APHM Marseille France
5. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
6. Inserm CIC 1431 University Hospital of Besançon Besançon France