1. West German Study Group, Moenchengladbach, Germany
2. Ev. Bethesda Hospital, Breast Center Niederrhein, Moenchengladbach, Germany
3. University Clinics Cologne, Women's Clinic and Breast Center, Cologne, Germany
4. Breast Unit, Kliniken Essen-Mitte, Essen, Germany
5. Clinic for Gynecology with Breast Center, Charité-Universitätsmedizin Berlin, Berlin, Germany
6. Medical School Hannover, Institute for Pathology, Hannover, Germany
7. Department of Gynecology, Breast Center, Red Cross Hospital Munich, Munich, Germany
8. University Clinics Essen, Women's Clinic, Essen, Germany
9. University Clinics Leipzig, Women's Clinic, Leipzig, Germany
10. Niels Stensen Clinics, Clinics for Oncology, Osnabrück, Germany
11. Oncology Practice Network Troisdorf, Troisdorf, Germany
12. University Clinics Tübingen, Women's Clinic, Tuebingen, Germany
13. St Elisabeth Hospital, Cologne, Germany
14. Luisenhospital Duesseldorf, Practice for Senologic Oncology, Duesseldorf, Germany
15. University Clinics Aachen, Women's Clinic, Aachen, Germany
16. Ev. Hospital Bergisch Gladbach, Bergisch Gladbach, Germany
17. Markus Hospital, Breast Center, Frankfurt, Germany
18. Ev. Waldkrankenhaus Berlin, Berlin, Germany
19. Gynecologists at Bahnhofsplatz, Hildesheim, Germany
20. City Hospital Holweide, Breast Center, Cologne, Germany
21. Ev. Hospital Gelsenkirchen, Gelsenkirchen, Germany
22. Institute of Biostatistics and Registry Research, Brandenburg Medical School Theodor Fontane, Neuruppin, Germany
23. Faculty of Health Sciences, Joint Faculty of the Brandenburg University of Technology Cottbus – Senftenberg, the Brandenburg Medical School Theodor Fontane and the University of Potsdam, Neuruppin, Germany
24. Department of Gynecology, University Medical Center Hamburg, Hamburg, Germany
25. Breast Center, Department of Obstetrics and Gynecology and CCC Munich, LMU University Hospital, Munich, Germany
26. Exact Science, Inc, Redwood City, CA