1. Institute of Health Economics, Edmonton, Alberta, Canada, and Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, and Health Utilities, Inc., Dundee, Ontario, Canada
2. Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
3. Centre for Health Economics and Policy Analysis and Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada, and Health Utilities, Inc., Dundee, Ontario, Canada
4. Department of Medical Genetics, University of Alberta, Edmonton, Alberta, Canada
5. Departments of Psychiatry and Obstetrics and Gynaecology, University of Toronto, Toronto, Canada
6. Innovus Research Inc., Burlington, Ontario, Centre for Health Economics and Policy Analysis, McMaster University, and Health Utilities, Inc.
7. Department of Obstetrics and Gynaecology, McMaster University, Hamilton, Ontario, Canada
8. Nanyang Technological University, Singapore