1. Institute for Sociology and Demography University of Rostock Rostock Germany
2. Department of Demographic Studies German Center for Neurodegenerative Diseases (DZNE) Bonn Germany
3. Max Planck Institute for Demographic Research Rostock Germany
4. Rostock Center for the Study of Demographic Change Rostock Germany
5. Department of Demographic Studies German Center for Neurodegenerative Diseases (DZNE) Rostock Germany