1 Radiotherapy Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, Largo Brambilla 3, 50134 Firenze, Italy.
2 Department of Experimental Medicine, Sapienza University, 00161 Rome, Italy.
3 RestorGenex Pharmaceuticals, Inc., 37 Neillian Crescent, Jamaica Plain, MA 02130, USA.
4 Department of Experimental Medicine, Sapienza University, 00161 Rome, Italy ; Laboratory of Radiobiology and Division of Radiotherapy, Department of Applied, Clinical and Biotechnological Sciences, University of L'Aquila, Via Vetoio, Coppito 2, 67100 L'Aquila, Italy.