[1] La Maddalena Canc Ctr, Anesthesia & Intens Care Unit, Via san Lorenzo 312, I-90145 Palermo, Italy
[2] La Maddalena Canc Ctr, Pain Relief & Support Palliat Care Unit, Via san Lorenzo 312, I-90145 Palermo, Italy
[3] Univ Palermo, Policlin Paolo Giaccone, Sect Anestesia Analgesia Intens Care & Emergency, Dept Biopathol & Med Biotechnol DIBIMED, Via Vespro 129, I-90127 Palermo, Italy