[1] Univ Naples 2, Dept Expt Med, Biotechnol & Mol Biol Sect, Naples, Italy
[2] Leibniz Inst Expt Virol, Heinrich Pette Inst, Dept Tumorvirol, Hamburg, Germany
[3] Temple Univ, Sbarro Inst Canc Res & Mol Med, Ctr Biotechnol, Philadelphia, PA 19107 USA
[4] Natl Res Ctr Environm & Hlth GmbH, Helmholtz Zentrum, Inst Expt Genet, Munich, Germany
[5] Tech Univ Munich, Ctr Life & Food Sci Weihenstephan, Chair Expt Genet, WZW, Freising Weihenstephan, Germany
[6] Human Hlth Fdn, Spoleto, Italy
[7] Univ Siena, Dept Med Sci Surg & Neurosci, I-53100 Siena, Italy