[1] Azienda Osped Univ Santa Maria Misericordia, Clin Malattie Infett, Piazzale S Maria Misericordia 15, I-33100 Udine, Italy
[2] Univ Udine, Dept Med, Infect Dis Clin, Udine, Italy
[3] Azienda Sanitaria Univ, Integrata Udine, Udine, Italy
[4] Univ Genoa, Dept Hlth Sci, Genoa, Italy