1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
3. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
5. Institute for Vaccine Safety, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
6. Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
7. Berman Institute of Bioethics, Johns Hopkins University, Baltimore, Maryland, USA
8. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
9. Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland, USA