1. German Centre of Gerontology (DZA) , Berlin , Germany
2. Institute of Public Health, ZHAW Zurich University of Applied Sciences , Winterthur , Switzerland
3. Centre for the Interdisciplinary Study of Gerontology and Vulnerability (CIGEV) and National Centre of Competence in Research “Overcoming Vulnerability: Life Course Perspectives” (NCCR LIVES), University of Geneva , Switzerland