Authors' Affiliations: 1Department of Oncology and Surgical Sciences, Oncology Section, University of Padova; 2Istituto Oncologico Veneto–IRCCS, Padova, Italy; 3Translational Research Laboratory, Catalan Institute of Oncology, IDIBELL, L'Hospitalet de Llobregat, Spain; 4Institute of Physiology and Pathophysiology, University Medical Center of the Johannes Gutenberg University, Mainz, Rhineland Palatinate; 5Institute of Physiology, University of Halle, Saxony-Anhalt, Germany; and 6Istituto Superiore di Sanità, Rome, Italy (At 2011-06-14)