1. Department of Molecular Biology, Biomedical Research and Training Institute, Harare, Zimbabwe.
2. Department of Clinical Pharmacology and Department of Medical Microbiology, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
3. Department of Molecular Biology, Newlands Clinic, Harare, Zimbabwe.
4. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
5. Graduate School of Health Sciences, University of Bern, Bern, Switzerland.
6. Centre for the AIDS Programme of Research in South Africa, Durban, South Africa.
7. Department of Virology, University of KwaZulu-Natal, Durban, South Africa.
8. Critical Care Medicine Department, NIH Clinical Center, Bethesda, Maryland, USA.
9. School of Medicine, University of Stanford, Stanford, California, USA.