1. Intensive Care Unit, Hospital Morales Meseguer, Murcia, Spain;
2. Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, Unit of Anesthesiology, University of Salerno, Baronissi, Italy; and
3. Department of Anesthesia and Critical Care, Istituto Nazionale Tumori-IRCCS, Fondazione Pascale, Naples, Italy