1. Population Research Centre, University of Groningen, Groningen, The Netherlands
2. Department of Public Health, University of Amsterdam, Amsterdam, The Netherlands
3. Laboratory of Demographic Data, Max Planck Institute for Demographic Research, Rostock, Germany
4. Centre for Demographic Research, Vytautas Magnus University, Kaunas, Lithuania
5. Netherlands Interdisciplinary Demographic Institute, The Hague, The Netherlands