1. Department of Molecular Pathology; Netherlands Cancer Institute; Amsterdam The Netherlands
2. West German Study Group; Germany
3. Breast Centre Niederrhein; Moenchengladbach Germany
4. Brustzentrum; Ludwig-Maximillian University Munich; Germany
5. Universitäts-Frauenklinik Duesseldorf; Germany
6. Genomics Core Facility; NKI-AVL; Amsterdam The Netherlands
7. Universitäts-Frauenklinik Lübeck; Germany
8. Division of Medical Oncology; Netherlands Cancer Institute, Amsterdam; The Netherlands Department of Pathology; University Medical Center Utrecht; Utrecht The Netherlands
9. Universitäts-Frauenklinik, University of Heidelberg; Germany
10. National Center for Tumour Diseases; University of Heidelberg; Germany