1. Department of Emergency Medicine, Alpert Medical School of Brown University, Providence, RI 02903, USA
2. International Medical Corps, Washington, DC 20036, USA
3. International Medical Corps, Goma, Democratic Republic of the Congo
4. Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
5. Brown University, Providence, RI 02912, USA
6. Rhode Island Hospital, Providence, RI 02903, USA
7. James A. Ferguson Infectious Disease Program, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
8. Expanded Programme on Immunization, Goma, Democratic Republic of the Congo
9. Division of Global Health Protection, Centers for Disease Control and Prevention, Kinshasa, Democratic Republic of the Congo
10. Division of Global HIV and TB, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA