1. Department of Anesthesiology, University Medical Center Göttingen, Göttingen, Germany;
2. IRCCS San Raffaele Scientific Institute, Milan, Italy;
3. Department of Anesthesiology, Intensive Care and Emergency Medicine, Donau Isar Hospital Deggendorf, Deggendorf, Germany;
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; and
5. Department of Pulmonary and Critical Care Medicine, University of Minnesota and Regions Hospital, St. Paul, Minnesota