[1] Univ Milan, Dept Biomed Sci & Technol, I-20090 Milan, Italy
[2] IRCCS, Don C Gnocchi Fdn, Lab Mol Med & Biotechnol, Milan, Italy
[3] Kinki Univ, Sch Med, Dept Immunol, Osaka 589, Japan
[4] Ist Sci San Raffaele, Immunobiol HIV Unit, I-20132 Milan, Italy
[5] SM Annunziata Hosp, Infect Dis Unit, Florence, Italy
[6] Inst Rech Dev, Montpellier, France
[7] Univ Montpellier I, Viral & Mol Immunophysiopathol Lab, Fac Pharm, Montpellier, France