1. Department of Medical Microbiology; College of Health Sciences; University of Zimbabwe; Harare Zimbabwe
2. Department of Microbiology and Infection Control; Akershus University Hospital; Lørenskog Norway
3. Department of Immunology; College of Health Sciences; University of Zimbabwe; Harare Zimbabwe
4. Department of Community Medicine; College of Health Sciences; University of Zimbabwe; Harare Zimbabwe
5. Department of Research; Cancer Registry of Norway; Oslo Norway
6. Department of Medicine; University of California; San Francisco California
7. Women's Clinic; Rikshospitalet; Oslo University Hospital and Institute of Clinical Medicine; University of Oslo; Oslo Norway
8. Department of Obstetrics and Gynaecology; College of Health Sciences; University of Zimbabwe; Harare Zimbabwe