[1] IRCCS, Natl Inst Infect Dis L Spallanzani, Viral Immunodeficiency Unit, Clin & Res Infect Dis Dept, Rome, Italy
[2] ICONA Fdn, Milan, Italy
[3] IRCCS San Gerardo Tintori, Infect Dis Unit, Monza, Italy
[4] IRCCS Osped Policlin San Martino, Infect Dis Clin, Genoa, Italy
[5] ASST Grande Osped Metropolitano Niguarda, Dept Infect Dis, Milan, Italy
[6] Univ Brescia, Unit Infect & Trop Dis, Dept Clin & Expt Sci, Brescia, Italy
[7] ASST Spedali Civili Brescia, Brescia, Italy
[8] Univ Milan, Dept Hlth Sci, ASST Santi Paolo & Carlo, Clin Infect Dis, Milan, Italy
[9] Univ Turin, Amedeo Savoia Hosp, Dept Med Sci, Infect Dis Unit, Turin, Italy
[10] Univ Udine, Dept Med, Infect Dis Clin, ASUFC, Udine, Italy
[11] Univ Milano Bicocca, Infect Dis Unit, Dept Infect Dis, IRCCS San Gerardo Tintori, Milan, Italy
[12] Univ Modena, Dept Infect Dis, Azienda Osped Univ Policlin Modena, Dept Surg Med Dent & Morphol Sci, Modena, Italy
[13] Univ Vita Salute San Raffaele, IRCCS San Raffaele Sci Inst, Infect Dis Unit, Milan, Italy
[14] IRCCS, Natl Inst Infect Dis L Spallanzani, Clin & Res Infect Dis Dept, Viral Immunodeficiency Unit, Rome, Italy
[15] Inst Global Hlth, Ctr Clin Res Epidemiol Modelling & Evaluat, London, England