1. Clinical Research and Biostatistics Department, Centre Léon Bérard , Lyon, France
2. UMR CNRS 5558 LBBE, Claude Bernard Lyon 1 University , Villeurbanne, France
3. Data Direction, UNICANCER , Paris, France
4. Department of Cancer Medicine, Gustave Roussy , Villejuif, France
5. Prevention & Public Health Department, Centre Léon Bérard , Lyon, France