1. Department of Microbiology, New York University School of Medicine, New York, New York 10010.
2. Laboratory of Molecular Virology, Division of Emerging and Transfusion Transmitted Diseases, US FDA, Bethesda, Maryland 20892.
3. Laboratoire de Santé Hygiène Mobile, Yaoundé, Cameroon.
4. Department of Pathology, New York University School of Medicine, New York, New York 10010.
5. Ministry of Public Health, Yaoundé, Cameroon.
6. Veterans Affairs New York Harbor Healthcare Systems, New York, New York.