Fraga Sílvia, Lucas Raquel, Barros Henrique
Institute of Public Health, University of Porto, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Portugal.
Institute of Public Health, University of Porto, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Portugal.
Ann Epidemiol. 2014 May;24(5):404-6. doi: 10.1016/j.annepidem.2014.02.005. Epub 2014 Feb 15.