1. Population Research Unit, Faculty of Social Sciences, University of Helsinki, Helsinki, Finland
2. King’s College London, Department of Global Health and Social Medicine, London, United Kingdom
3. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
4. Department of Public Health Sciences, Stockholm University, Stockholm, Sweden
5. Laboratory of Population Health, Max Planck Institute for Demographic Research, Rostock, Germany