1 Department of Anesthesiology, University Medical Center, Georg-August-University Göttingen, Göttingen, Germany.
2 Department of Health Sciences, University of Milan, Milan, Italy.
3 Department of Anesthesia, Intensive Care and Emergency, "City of Health and Science" Hospital, Turin, Italy; and.
4 Department of Adult Critical Care, Guy's and St. Thomas' NHS Foundation Trust, Health Centre for Human and Applied Physiological Sciences, London, United Kingdom.
5 Department of Anesthesiology and Intensive Care, ASST Santi e Paolo Hospital, and.