Department of Medical Oncology and Comprehensive Cancer Center, University Hospital Grosshadern, Marchioninistr. 15, D-81377, Munich, Germany. Electronic address: Volker.Heinemann@med.uni-muenchen.de. Department of Medical Oncology, Hospital Universitario Marqués de Valdecilla, Av. de Valdecilla, 39008, Santander, Spain. Electronic address: oncrhf@humv.es. Department of Oncology, Indiana University Simon Cancer Center, 535 Barnhill Drive, Indianapolis, IN, 46202, USA. Electronic address: bhoneil@iu.edu. Department of Medical Oncology and Comprehensive Cancer Center, University Hospital Grosshadern, Marchioninistr. 15, D-81377, Munich, Germany. Electronic address: Sebastian.Stintzing@med.uni-muenchen.de. Biostatistics, Amgen Ltd, 1 Uxbridge Business Park, Sanderson Road, Uxbridge, Middlesex, UB8 1DH, UK. Electronic address: reijak@amgen.com. Medical Development, Amgen Switzerland AG, Dammstrasse 23, 6301, Zug, Switzerland. Electronic address: jan-henrik.terwey@amgen.com. Department of Medical Oncology, Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, 44805, St Herblain, France. Electronic address: jean-yves.douillard@esmo.org.