1. Max Planck Institute for Demographic Research, Rostock, Germany
2. Department of Sociology, Stockholm University, Stockholm, Sweden
3. Swedish Collegium for Advanced Study, Uppsala, Sweden
4. Centre for Sociological Research, Katholieke Universiteit Leuven, Leuven, Belgium
5. Population Science, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
6. Department of Surgery, University of Utah, Salt Lake City, UT, USA
7. Department of Family and Consumer Studies, University of Utah, Salt Lake City, UT, USA