Northstar Medical Center, Chicago, Illinois, United States
Southampton Healthcare, Inc., St. Louis, Missouri, United States
Gordon E. Crofoot, MD, PA, Houston, Texas, United States
Vienna Challenge Chamber, Vienna, Austria
University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
The Lindner Clinical Trial Center, Cincinnati, Ohio, United States
Cardiovascular Institute of the South Clinical Research Corporation, Houma, Louisiana, United States
Nucleus Network Ltd., Melbourne, Victoria, Australia
Atlanta Institute for Medical Research, Inc., Atlanta, Georgia, United States
Newark Beth Israel Medical Center, Newark, New Jersey, United States
University of Pittsburgh Medical Center Presbyterian, Pittsburgh, Pennsylvania, United States
Gilead Sciences, Madrid, Spain