Heart Failure, Congestive

• Huntsville, Alabama, United States
• Phoenix, Arizona, United States
• Scottsdale, Arizona, United States
• Little Rock, Arkansas, United States

• Azienda Ospedaliero-Universitaria di Modena — Modena, Italy

• Oracle Research, A Div of the Heart Center — Huntsville, Alabama, United States
• Merced Heart Associates — Merced, California, United States
• Olive View-UCLA Medical Center — Sylmar, California, United States
• Broward General Medical Center — Fort Lauderdale, Florida, United States

• Meander Medical Center Amersfoort — Amersfoort, Utrecht, Netherlands
• Univ. Medical Center Utrecht — Utrecht, Netherlands

Not specified

• Kantonsspital Luzern, Department of Cardiology — Lucerne, Canton of Lucerne, Switzerland

Not specified

Not specified

Not specified

• William Beaumont Hospital — Royal Oak, Michigan, United States