Department of Internal Medicine I, Comprehensive Cancer Center and Gaston H. Glock Research Center, Medical University of Vienna, Vienna, Austria. Electronic address: guenther.steger@meduniwien.ac.at. Cancerología de Querétaro, Querétaro, Mexico. Chemotherapy Department, Russian Research Centre of Roentgenoradiology, Moscow, Russia. National Cancer Research Center, Giovanni Paolo II Cancer Institute, Bari, Italy. CHU de Limoges, Limoges Cedex, France. Department of Internal Medicine 2, University Hospital Krems, Karl Landsteiner Private University, Krems, Austria. Hospital A. Manzoni, Lecco, Italy. Copernicus Memorial Hospital, Lodz, Poland. Hospital La Paz, Paseo de la Castellana, Madrid, Spain. Institut de Recherche Pierre Fabre, Boulogne-Billancourt Cédex, France.