1. Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden;
2. Breast Cancer, Endocrine Tumours and Sarcoma Section, Theme Cancer, Karolinska University Hospital, Stockholm, Sweden;
3. CKC, Theme Cancer, Karolinska University Hospital, Stockholm, Sweden;
4. Department of Surgery, Medical University of Vienna, Vienna, Austria;
5. Austrian Breast and Colorectal Cancer Study Group, Vienna, Austria;
6. Department of Medical Oncology, Medical University, Vienna, Austria;
7. Gaston H. Glock Research Center, Medical University, Vienna, Austria;
8. IIIrd Medical Department, Cancer Cluster Salzburg, Salzburg Cancer Research Institute, Paracelsus Medical University Salzburg, Salzburg, Austria;
9. Department of Obstetrics and Gynecology, Helios Klinikum Berlin-Buch, Berlin, Germany;
10. Department of Gynecology and Obstetrics, Klinikum Frankfurt Höchst, Academic Hospital of the Goethe University, Frankfurt, Germany;
11. German Breast Group, Neu-Isenburg, Germany