1. Netherlands Interdisciplinary Demographic Institute (NIDI), PO Box 11650, 2502 AR The Hague, The Netherlands
2. University of Groningen, PO Box 72, 9700 AB Groningen, The Netherlands
3. Department of Sociology and Social Psychology, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany
4. Department of Epidemiology, University Medical Center Groningen (UMCG), University of Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands
5. Department of Sociology, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HVAmsterdam, The Netherlands