1. Department of General Surgery, Breast Cancer Unit Complexo Hospitalario Universitario de Ourense Ourense Spain
2. Department of General Surgery Hospital Público de Verín Ourense Spain
3. Department of Preventive Medicine and Public Health University of Granada Granada Spain
4. Unidad de Mastología Grupo Oroño Rosario Argentina
5. Department of General Surgery Hospital de Motril Granada Spain
6. CIBER of Epidemiology and Public Health CIBERESP Madrid Spain
7. Instituto de Investigación Biosanitaria IBS Granada Spain