[1] Univ Roma La Sapienza, Dept Med Surg Sci & Biotechnol, Rome, Italy
[2] Ist Super Sanita, Dept Infect Parasit & Immunemediated Dis, Rome, Italy
[3] WHO, Int Agcy Res Canc, Infect & Canc Biol Grp, Lyon, France
[4] Univ Roma Tre, Dept Biol, Rome, Italy
[5] CNR, Inst Mol Biol & Pathol, Rome, Italy