1. German Breast Group, Neu-Isenburg, Germany2Sana Klinimum, Offenbach, Germany
2. University Hospital Jena, Jena, Germany
3. European Institute of Oncology, Milano, Italy
4. Chaim Sheba Medical Center, Ramat Gan, Israel
5. University of Aachen, Aachen, Germany
6. Charite Berlin, Berlin, Germany
7. German Breast Group, Neu-Isenburg, Germany
8. Blochin Cancer Research Center, Moscow, Russia
9. Department of Oncology, Oslo University Hospital, Oslo, Norway
10. University Hospital Halle (Saale), Halle (Saale), Germany
11. University Hospital Gasthuisberg, Leuven, Belgium
12. Radboud University Medical Center, Nijmegen, the Netherlands
13. Trousseau Hospital, Paris, France
14. Leuven Cancer Institute, Leuven, Belgium