1. Department of Sociology, University of Western Ontario , London, Ontario , Canada
2. Department of Political Science, University of Western Ontario , London, Ontario , Canada
3. Department of Sociology, University at Buffalo, State University of New York , Buffalo, New York , USA
4. Department of Family Studies and Gerontology, Global Aging and Community Initiative, Mount Saint Vincent University , Halifax, Nova Scotia , Canada
5. Integrative Pain Laboratory, School of Public Health, University of Haifa , Haifa , Israel
6. Department of Community Dentistry and Behavioral Science, University of Florida , Gainesville, Florida , USA
7. Department of Sociology, University of Texas at Austin , Austin, Texas , USA
8. Department of Anesthesiology and Perioperative Medicine, Queens University , Kingston, Ontario , Canada
9. Department of Epidemiology, Aberdeen Centre for Arthritis and Musculoskeletal Health, University of Aberdeen , Aberdeen , UK