1. Institute of Medical Sociology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Str. 8, Halle (Saale) 06112, Germany
2. Institute of Health and Society, Universit� catholique de Louvain, Louvain-la-Neuve, IRSS Clos Chapelle-aux-champs 30/B1.30.15 1200 Woluwe-Saint-Lambert, Brussels, Belgium
3. Centro de Investiga��o em Sa�de P�blica, Escola Nacional de Sa�de P�blica, Universidade NOVA de Lisboa, Av. Padre Cruz, 1600-560 Lisboa, Portugal
4. Faculty of Social Sciences (SOC), Health Sciences, 33014 Tampere University, Tampere, Finland
5. Department of Public Health, Amsterdam UMC, University of Amsterdam, Academisch Medisch Centrum, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands