Brigham and Women's Hospital, Boston, Massachusetts, United States
Beaumont Health System, Royal Oak, Michigan, United States
Summa Health System, Department of Emergency Medicine (Research), Akron, Ohio, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
Greenville Hospital System University Medical Center, Greenville, South Carolina, United States
Airways Biology Initiative at Penn Presbyterian Medical Center, Philadephia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States
Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States
Virginia Mason Medical Center, Seattle, Washington, United States
California Pacific Medical Center, San Francisco, California, United States
Center for Interdisciplinary Research on Nicotine Addiction, University of Pennsylvania, Philadelphia, Pennsylvania, United States
Division of Infectious Diseases & HIV Medicine at Drexel University College of Medicine, Philadelphia, Pennsylvania, United States
University of Pennsylvania, Philadelphia, Pennsylvania, United States