1. Department of Public Health and caring sciences, Social Medicine Uppsala University BMC Uppsala Sweden
2. London School of Hygiene & Tropical Medicine London UK
3. Department of Public Health Erasmus Medical Center Rotterdam The Netherlands
4. INSERM CépiDc 44, chemin de Ronde Paris France
5. Department of Public Health University of Tartu Tartu Estonia
6. Department of Preventive Medicine and Public Health University of Valencia Valencia Spain