1. Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA.
2. Global Virus Network, Baltimore, MD, USA.
3. OPEN and Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark.
4. Bandim Health Project, Bissau, Guinea-Bissau.
5. Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA.