Heart Failure, Congestive

• Royal Alexandra Hospital — Edmonton, Alberta, Canada
• University of Alberta Hospital — Edmonton, Alberta, Canada
• Grey Nuns Community Hospital — Edmonton, Alberta, Canada

• Parkland Hospital — Dallas, Texas, United States

• Department of Cardiology, Odense University Hospital — Odense, Odense C, Denmark

• DaVita Clinical Research — Minneapolis, Minnesota, United States

• Multiple locations — Saint Paul, Minnesota, United States

• Cardiovascular Associates/Office of Clinical Research — Birmingham, Alabama, United States
• Cardiology, P.C. Research — Birmingham, Alabama, United States
• University Alabama at Birmingham — Birmingham, Alabama, United States
• Oracle Research-The Heart Center — Huntsville, Alabama, United States

• The Cooper Institute — Dallas, Texas, United States

• Denver Health Medical Center — Denver, Colorado, United States

Not specified

• Kaiser Permanente of Colorado — Aurora, Colorado, United States