Josep M Argilés1, Maurizio Muscaritoli2. 1. Cancer Research Group, Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona and Institut de Biomedicina de la Universitat de Barcelona, Barcelona, Spain. Electronic address: jargiles@ub.edu. 2. Department of Clinical Medicine, Sapienza University of Rome, Rome, Italy.