1 Division of Pulmonary, Allergy and Critical Care, Columbia University College of Physicians and Surgeons, New York, NY, USA. [email protected].
2 Center for Acute Respiratory Failure, Columbia University Irving Medical Center, 622 W168th St, PH 8E, 101, New York, NY, 10032, USA. [email protected].
3 Centre d'Etudes et de Recherches sur les Services de Santé et Qualité. de Vie EA 3279, Médecine Intensive Réanimation, Hôpital Nord, AP-HM, Marseille, France.
4 Division of Pulmonary & Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.