1. University of Heidelberg Medical Center, Heidelberg, Germany;
2. Azienda USL Bellaria-Maggiore Hospital, Bologna, Italy;
3. European Organisation for Research and Treatment of Cancer Headquarters, Brussels, Belgium;
4. Heidelberg University Hospital, Heidelberg, Germany;
5. Heidelberg University Hospital, German Cancer Research Center (DKFZ), Heidelberg, Germany;
6. Erasmus MC, Rotterdam, Netherlands;
7. Medical Center Haaglanden, The Hague, Netherlands;
8. Institut Gustave Roussy, Villejuif, France;
9. Universite Pierre et Marie Curie Paris VI, Paris, France;
10. Cancer Institute of the West (ICO), Centre René Gauducheau, Medical Oncology Department, Saint-Herblain, France;
11. UZ Leuven-Gasthuisberg, Leuven, Belgium;
12. University of Lausanne Hospitals, Lausanne, Switzerland;
13. ICM Val d'Aurelle, Montpellier, France;
14. Centre Oscar Lambret, Lille, France;
15. CHRU, Lille, France;
16. VU Amsterdam, Amsterdam, Netherlands;
17. Heidelberg University Hospital,German Cancer Research Center (DKFZ), Heidelberg, Germany;
18. University Hospital Zurich, Zurich, Switzerland;
19. European Organization for Research and Treatment of Cancer, Brussels, Belgium;
20. Daniel den Hoed Cancer Center, Rotterdam, Netherlands;