1. Population Health Sciences Institute, Newcastle University, Newcastle Upon Tyne, UK
2. Centre for Global Health Inequalities Research (CHAIN). Department of Sociology and Political Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
3. School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
4. Dondena Centre for Research on Social Dynamics and Department of Social & Political Sciences, Bocconi University, Milano, Italy