1. Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
2. Ragon Institute of MGH, MIT and Harvard, Cambridge, MA;
3. Center for International Health Research, Brown University, Rhode Island Hospital, Providence, RI;
4. Center for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya;
5. Jaramogi Oginga Odinga Teaching and Referral Hospital, Ministry of Health, Kisumu, Kenya; and
6. Viral Immunology, Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland