1. Epidemic Intelligence Service, Division of Global HIV and Tuberculosis, CGH Centers for Disease Control and Prevention Atlanta Georgia USA
2. Division of Global HIV and Tuberculosis, CGH Centers for Disease Control and Prevention Atlanta Georgia USA
3. Division of Global HIV and Tuberculosis Centers for Disease Control and Prevention Yaoundé Cameroon
4. Division of Global HIV and Tuberculosis Centers for Disease Control and Prevention Lilongwe Malawi
5. Western Province Blood Transfusion Service Cape Town South Africa