1. Department of Family Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
2. APIN Centre, Jos University Teaching Hospital, Jos, Nigeria
3. Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA, USA
4. Department of Obstetrics & Gynaecology, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
5. Department of Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
6. National Agency for the Control of AIDS, Abuja, Nigeria