1. National Center for Epidemiology, Instituto de Salud Carlos IIIMadrid Spain
2. Preventive Medicine Unit. Hospital Infanta LeonorMadrid Spain
3. Department of Public HealthMiguel Hernandez UniversityAlicante Spain
4. Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública CIBERESP), Instituto de Salud Carlos IIIMadrid Spain
5. Aragón Breast Cancer Screening Programme, Health Service of AragonZaragoza Spain
6. Cancer Prevention and Control Unit, Catalan Institute of Oncology (ICO)Barcelona Spain
7. Valencia Breast Cancer Screening Programme, General Directorate Public HealthValencia Spain
8. Centro Superior de Investigación en Salud Pública (CSISP)Valencia Spain
9. Navarra Breast Cancer Screening Programme, Public Health InstitutePamplona Spain
10. Castile‐León Breast Cancer Screening Programme, General Directorate Public Health SACYLBurgos Spain
11. Balearic Islands Breast Cancer Screening Programme, Health Promotion for women and childhood, General Directorate Public Health and Participation, Regional Authority of Health and Consumer AffairsBalearic Islands Spain
12. Galicia Breast Cancer Screening Programme, Regional Authority of Health, Galicia Regional GovernmentA Coruña Spain