1. Department of Immunology, College of Health Sciences; University of Zimbabwe; Avondale Harare Zimbabwe
2. Department of Medical Laboratory Sciences; College of Health Sciences; University of Zimbabwe; Avondale Harare Zimbabwe
3. Department of Medicine; College of Health Sciences; University of Zimbabwe; Avondale Harare Zimbabwe
4. Research Support Centre; College of Health Sciences; University of Zimbabwe; Avondale Harare Zimbabwe
5. Division of Obstetrics and Gynecology; Institute of Clinical Medicine; Rikshospitalet; Oslo University Hospital; Oslo Norway