[1] Univ Florence, Dept Internal Med, I-50134 Florence, Italy
[2] Azienda Osped Univ Careggi, Dept Biomed, Patol Med Unit, I-50134 Florence, Italy
[3] Univ Florence, Dept Med & Surg Crit Care, I-50134 Florence, Italy
[4] Univ Florence, Ctr Oncol Minimally Invas Surg, I-50134 Florence, Italy
[5] Univ Florence, Dept Internal Med, Div Immunol, I-50134 Florence, Italy