1 Anesthesia and Intensive Care, Policlinico Vittorio Emanuele San Marco University Hospital, Catania, Italy. Electronic address: maxsorbello@gmail.com.
2 Anesthesia and Intensive Care, Anestesia e Terapia Intensiva Polivalente, Azienda Ospedaliero-Universitaria, Sant'Orsola-Malpighi - Alma Mater Studiorum, Bologna, Italy.
3 Anesthesia and Intensive Care, Clinica di Anestesia e Rianimazione Ospedali Riuniti Ancona, Italy.
4 Department of Anaesthesiology and Pain Therapy, Bern University Hospital, University of Bern, Bern, Switzerland; Medical Education, School of Medicine, Sigmund Freud University Vienna, Vienna, Austria.