1. Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, Victoria, Australia
2. National Health and Medical Research Council Clinical Trials Centre, University of Sydney, Sydney, New South Wales, Australia
3. International Breast Cancer Study Group, Coordinating Center, Central Pathology Office, Bern, Switzerland
4. International Breast Cancer Study Group, Central Pathology Office, Department of Pathology, European Institute of Oncology, Milan, Italy
5. Division of Pathology and Laboratory Medicine, European Institute of Oncology, Milan, Italy
6. Novartis Pharma AG, Basel, Switzerland
7. Novartis Institutes for Biomedical Research, Basel, Switzerland
8. Breast Center, Cantonal Hospital, St Gallen, Switzerland
9. International Breast Cancer Study Group Central Pathology Office, European Institute of Oncology, University of Milan, Milan, Italy
10. Division of Medical Senology, European Institute of Oncology, Milan, Italy
11. Department of Biostatistics and Computational Biology, International Breast Cancer Study Group Statistical Center, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts