1. Division of Intramural Research, NIAID, NIH, Baltimore, Maryland.
2. Department of Pathology, Johns Hopkins University, Baltimore, Maryland.
3. Department of Pathology, New York University, New York, New York.
4. Medical Diagnostic Center, Yaoundé, Cameroon.
5. VA Medical Center, New York Harbor Healthcare Systems, New York, New York.
6. Department of Medicine, Johns Hopkins University, Baltimore, Maryland.