1. Social and Economic Policy, UNICEF Office of Research—Innocenti, Florence, Italy
2. Institute of Medical Sociology, Martin Luther University of Halle-Wittenberg, Halle, Germany
3. Department of Public Health Sciences, Queen’s University, Ontario, Kingston, Canada
4. University of Luxembourg, Esch-sur-Alzette, Luxembourg
5. Utrecht Centre for Child and Adolescent Studies, Utrecht University, Utrecht, The Netherlands