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