1. Radiation Epidemiology Group, CESP Center for Research in Epidemiology and Population Health, U1018 INSERM, Villejuif, France.
2. Gustave Roussy Institute, Villejuif, France.
3. University Paris Sud 11, UMRS 1018, Villejuif, France.
4. Environmental Epidemiology of Cancer, CESP Center for Research in Epidemiology and Population Health, U1018 INSERM, Villejuif, France.