1. Unit of Anesthesia and Intensive Care, Vascular Access Team, Centro di Riferimento Oncologico di Aviano, IRCCS, National Cancer Institute, Aviano, (PN) Italy
2. Department of Anesthesia and Intensive Care, Fondazione Policlinico Universitario “A. Gemelli,” Rome, Italy
3. Department of Surgery, Fondazione Policlinico Universitario “A. Gemelli,” Rome, Italy