1. Netcare Breast Care Centre of Excellence, Milpark Hospital, 9 Guild Road Parktown, South Africa
2. Department of Immunology, Faculty of Health Sciences, University of Pretoria, Corner Doctor Savage Road and Bophelo Road, Pretoria 0002, South Africa
3. Drs Gritzman & Thatcher Inc. Laboratories, 4 Main Street, Bordeaux, Randburg, Johannesburg 2194, South Africa
4. University of the Witwatersrand, Donald Gordon Medical Centre, 21 Eton Road, Parktown Johannesburg, 2193, South Africa
5. Helen Joseph Hospital Breast Care Clinic, Department of Surgery, Faculty of Health Sciences, University of the Witwatersrand, 1 Perth Road, Auckland Park, Johannesburg, 2092 Gauteng, South Africa
6. The Medical Oncology Centre of Rosebank, 129 Oxford Road, Johannesburg 2196, South Africa