1. School of Medicine, Universitat Autònoma de Barcelona Barcelona Spain
2. Faculty of Health and Life SciencesUniversitat Pompeu Fabra Barcelona Spain
3. CIBER de Epidemiología y Salud Pública (CIBERESP) Madrid Spain
4. Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
5. Universidad de Huelva Huelva Spain
6. Population Health and Occupational DiseaseNational Heart and Lung Institute, Imperial College London London United Kingdom
7. Genetic and Molecular Epidemiology GroupSpanish National Cancer Research Centre (CNIO) Madrid Spain
8. Centro de Investigación Biomédica en Red de Cáncer (CIBERONC) Madrid Spain