University of Chicago, University of Chicago, University of Chicago, University of Minnesota - Minneapolis - Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Rush University - Rush University Medical Center, Rush University - Rush University Medical Center, Rush University - Rush University Medical Center, Emory University, Emory University, University of Pennsylvania - Perelman School of Medicine, University of Pennsylvania - Perelman School of Medicine, University of Michigan at Ann Arbor, Oregon Health and Science University, Oregon Health and Science University, Northwestern University - Feinberg School of Medicine, Northwestern University - Feinberg School of Medicine, Johns Hopkins University, University of California, San Francisco (UCSF), University of California, San Francisco (UCSF), Cardiff University, Northwestern University, University of Chicago and University of Chicago