Auburn University, Auburn, Alabama, United States
University of Utah Hospital, Salt Lake City, Utah, United States
Children's National Hospital & Research Institute, Washington, District of Columbia, United States
Seattle Children's Hospital, Seattle, Washington, United States
Valley Presbyterian Hospital, Los Angeles, California, United States
University of Maryland, Baltimore, Maryland, United States
George Washington University Hospital, Washington, District of Columbia, United States
VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, United States
VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, United States
Erlanger Baroness Hospital, Chattanooga, Tennessee, United States
Midwest Chest Consultants, Saint Charles, Missouri, United States
Knox Community Hospital, Mount Vernon, Ohio, United States
Riverside Regional Medical Center, Newport News, Virginia, United States
Athens Regional Medical Center, Athens, Georgia, United States
Erlanger Health System, Chattanooga, Tennessee, United States
Memorial Hermann Hospital, Houston, Texas, United States
Oxford University Hospitals NHS Trust, Oxford, Oxfordshire, United Kingdom
Ashford and St. Peter's Hospitals NHS Trust, Chertsey, Surrey, United Kingdom
Sleep Disorders Centers of the Mid-Atlantic, Glen Burnie, Maryland, United States
Temple University Hospital, Philadelphia, Pennsylvania, United States