1. U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
2. Virology Department, Centre Pasteur, Yaounde, Cameroon
3. Department of Infectious Diseases & Immunology and Emerging Pathogens Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
4. Virology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
5. Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA