1. Max Planck Institute for Demographic Research, Rostock, Germany
2. Max Planck Institute for Demographic Research, Rostock, Germany; Max Planck–University of Helsinki Center for Social Inequalities in Population Health, Rostock, Germany/Helsinki, Finland
3. Max Planck Institute for Demographic Research, Rostock, Germany; Helsinki Institute for Demography and Population Health, University of Helsinki, Helsinki, Finland; Max Planck–University of Helsinki Center for Social Inequalities in Population Health, Rostock, Germany/Helsinki, Finland