1. Muskie School of Public Service, University of Southern Maine, Portland, Maine
2. Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York
3. Department of Economics and Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Québec, Canada
4. Department of Equity, Ethics, and Policy and Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Québec, Canada
5. Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, Maryland
6. Department of Obstetrics & Gynaecology, University of British Columbia, Vancouver, British Columbia, Canada