1 Public Health & Preventive Medicine Teaching Unit, National School of Public Health, Consortium for Biomedical Research in Epidemiology & Public Health (CIBERESP), Carlos III Institute of Health, Madrid, Spain.
2 Research Unit, Fundación Piel Sana de la Academia Española de Dermatología y Venereología, Spain.
3 Department of Dermatology, Hospital Virgen de las Nieves, Granada, Spain.
4 Department of Dermatology, Hospital de Fuenlabrada, Madrid, Spain.
5 Faculty of Medicine, University of Granada, Granada, Spain.
6 Department of Dermatology, Complexo Hospitalario Universitario de Vigo (CHUVI), Vigo, Spain.