1 Division of Pulmonary, Allergy & Critical Care Medicine, Columbia University College of Physicians & Surgeons, New York, NY 10032, USA. Electronic address: hdb5@cumc.columbia.edu.
2 Division of Pulmonary, Critical Care, and Sleep Medicine, Harborview Medical Center, Seattle, WA, USA; Cambia Palliative Care Center of Excellence, University of Washington Medical Center, Seattle, WA, USA.
3 Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.
4 Division of Pulmonary, Allergy & Critical Care Medicine, Columbia University College of Physicians & Surgeons, New York, NY 10032, USA; Department of Intensive Care Adults, Erasmus MC University Medical Center, Rotterdam, Netherlands.
5 Assistance Publique-Hopitaux de Marseille, Hopital Nord, Reanimation des Detresses Respiratoires et des Infections Severes, Marseille, France; Faculte de Medecine, Aix-Marseille Universite, Marseille, France.
6 Department of Anesthesiology, Division of Critical Care, Columbia University Medical Center, New York, NY, USA.
7 Anesthesia and Intensive Care Medicine, Sapienza Università di Rome, Rome, Italy.