[1] L Sacco Hosp Vialba, Dept Infect Dis, I-20157 Milan, Italy
[2] Univ Milano Bicocca, S Gerardo Hosp, Dept Insternal Med Prevent & Appl Biotechnologies, Monza, Italy
[3] Malattie Transmiss Sessuale Azienda Sanitary Loc3, Milan, Italy
[4] Padova Hosp, Div Malattie Infett, Padua, Italy
[5] St Anna Hosp, Div Malattie Infett, Como, Italy
[6] Busto Arsizio Hosp, Busto Arsizio, Italy