1. Department of Dermatology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
2. Botswana-UPenn Partnership, Gaborone, Botswana.
3. Biomedical Library, University of Pennsylvania, Philadelphia, Pennsylvania.
4. University of Botswana School of Medicine, Gaborone, Botswana.
5. Division of Infectious Diseases, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.