Abstract
Department of Public Health, Section for Epidemiology, Aarhus University, Bartholins Alle 2, DK-8000 Aarhus C, Denmark, School of Public Health, University of California, Los Angeles, CA, USA, WHO Regional Office for Europe, European Union Office, Brussels, Belgium, Post-Graduate Programme in Epidemiology, Federal University of Pelotas, Pelotas, Brazil and European Educational Programme in Epidemiology, Florence, Italy
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