1. Center for Clinical Microbiology; University College; London UK
2. University of Zambia and University College London Medical School Research and Training Programme; Lusaka Zambia
3. Department of Obstetrics and Gynaecology; University Teaching Hospital; Lusaka Zambia
4. Department of Paediatrics and Child Health; University Teaching Hospital; Lusaka Zambia
5. National Tuberculosis Control Programme; Ministry of Health; Lusaka Zambia
6. Department of Tumour Immunology and Microbiology; Karolinska Institute; Stockholm Sweden
7. Ministry of Health; Lusaka Zambia