1. Division of Infectious Diseases and HIV Medicine, Case Western Reserve University, University Hospitals Case Medical Center, Cleveland, OH, USA
2. Division of Infectious Diseases, Akron General Medical Center, Akron, OH, USA
3. Family Health International, Durham, NC, USA
4. Department of Obstetrics and Gynaecology, University of Zimbabwe Medical School, Harare, Zimbabwe
5. Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda