1. Second Department of Anesthesia and Intensive Care, Medical University of Warsaw, Poland.
2. Department of Critical Care, King’s College Hospital, London, United Kingdom.
3. Department of Anaesthesia and Intensive Care, Univeristy Hospital Policlinico-San Marco, Catania, Italy.
4. School of Anaesthesia and Intensive Care, University Hospital “G. Rodolico,” University of Catania, Catania, Italy.
5. Department of Perioperative Medicine, St Bartholomew’s Hospital, London, United Kingdom.