[1] Univ Florence, Dept Expt & Clin Med, Florence, Italy
[2] Azienda Osped Univ Careggi, Infect & Trop Dis Unit, Florence, Italy
[3] Azienda Osped Univ Careggi, Intermediate Care Unit, Florence, Italy
[4] Azienda Osped Univ Careggi, Dept Anesthesiol & Intens Care, Florence, Italy
[5] Azienda Osped Univ Careggi, Dept Internal Med, Florence, Italy
[6] Univ Florence, Hlth Sci Dept, Sect Anesthesiol Intens Care & Pain Med, Florence, Italy