1. Preventive Medicine and Public Health, University of Santiago de Compostela, Santiago de Compostela, Spain
2. Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
3. CIBER de Epidemiología y Salud Pública. CIBERESP, Spain
4. Health Science Research Centre CICS-UBI, University of Beira Interior, Covilhã, Portugal
5. Public Health Research Centre CISP, National School of Public Health (ENSP), Nova University Lisbon, Portugal
6. Centro Hospitalar Universitàrio Cova de Beira (CHUCB), Covilhã, Portugal