1. Preventive Medicine and Public Health Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
2. Research Unit for Inland Development, Guarda Polytechnic Institute (UDI-IPG), 6300 Guarda, Portugal
3. Health Sciences Research Centre Interior (Centro de Investigação em Ciências da Saúde-CICS/UBI), University of Beira, 6200 Covilhã, Portugal
4. Department of Medical Sciences, iBiMED-Institute of Biomedicine, University of Aveiro, 3810 Aveiro, Portugal
5. Consortium for Biomedical Research in Epidemiology and Public Health (CIBER en Epidemiología y Salud Pública/CIBERESP), 15706 Santiago de Compostela, Spain
6. Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela—IDIS), University of Santiago de Compostela, 15706 Santiago de Compostela, Spain