[1] San Michele Hosp, Dept Anesthesiol, Via Montella 4, I-81024 Maddaloni, Caserta, Italy
[2] San Michele Hosp, Cardiac Surg Intens Care Unit, Via Montella 4, I-81024 Maddaloni, Caserta, Italy
[3] Mater Dei Hosp, Dept Anesthesia, Bari, Italy
[4] Mater Dei Hosp, Intens Care Unit, Bari, Italy
[5] Mater Dei Hosp, Pain Therapy, Bari, Italy
[6] San Salvatore Acad Hosp, Dept Anesthesia, Laquila, Italy
[7] San Salvatore Acad Hosp, Intens Care Unit, Laquila, Italy
[8] G Mazzini Hosp, Dept Anesthesiol, Teramo, Italy
[9] G Mazzini Hosp, Intens Care Unit, Teramo, Italy