1. Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
2. Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
3. Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
4. Infectious Diseases Institute, Makerere University, Kampala, Uganda.
5. School of Public Health, Makerere University, Kampala, Uganda.
6. AIDS Control Program, Division of Sexually Transmitted Infections, Ministry of Health, Kampala, Uganda.
7. Sexual Health Clinics, Baltimore City Health Department, Baltimore, MD 21205, USA.
8. Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
9. Institute for NanoBiotechnology, Johns Hopkins University, Baltimore, MD 21218, USA.