1. Department of Internal Medicine III, Ulm University, Ulm, Germany;
2. Department of Internal Medicine I, University of Freiburg, Freiburg, Germany;
3. Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
4. Centre Hospitalier René Dubos, Cergy Pontoise, France;
5. Oslo University Hospital, Oslo, Norway;
6. Princess Margaret Cancer Centre, Toronto, ON, Canada;
7. Centre de Lutte Contre Le Cancer Henri Becquerel, Rouen, France;
8. Centre Hospitalo-Universitaire de Caen, Caen, France;
9. Centre Hospitalo-Universitaire de Limoges, Limoges, France;
10. Department of Internal Medicine II, Goethe University, Frankfurt, Germany;
11. Department of Medicine A, University of Münster, Münster, Germany;
12. University of Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany;
13. University Hospital Saint-Louis, Assistance Publique–Hôpitaux de Paris, Paris, France;
14. Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany; and
15. University Hospital Gasthuisberg Leuven, Leuven, Belgium