Sheldon Magder, MDProfessor of Medicine and PhysiologyRoyal Victoria Hospital (McGill University Health Centre)Department of Critical CareMontreal, Quebec, Canada Atul Malhotra, MDPeter C Farrell Presidential Chair and Tenured Professor of Respiratory MedicineUniversity of California San DiegoDepartment of MedicineLa Jolla, CA, USA Charles Corey Hardin, MD, PhDAssistant ProfessorMassachusetts General HospitalDivision of Pulmonary and Critical Care MedicineBoston, MA, USAKathryn A. Hibbert, MDDirector, Medical ICUMassachusetts General HospitalDivision of Pulmonary and Critical CareBoston, MA, USA