1 Department of Emergency, Clinic of Anesthesia and Intensive Care Unit, Ospedali Riuniti, Ancona, Italy.
2 Department of Anesthesia and Intensive Care, AOU Policlinico Vittorio Emanuele, Catania, Italy.
3 Department of Organ Failure and Transplantation, Anesthesia, Intensive Care and Transplantation Unit, St. Orsola-Malpighi University Hospital, Bologna, Italy.
4 Università Politecnica delle Marche, Ancona, Italy.