Heart Failure, Systolic

• San Diego Cardiac Center — San Diego, California, United States
• University of California, San Francisco — San Francisco, California, United States
• Washington University in Saint Louis — St Louis, Missouri, United States
• University of Texas Southwestern Medical Center — Dallas, Texas, United States

• Azienda Ospedaliero-Universitaria di Ferrara — Ferrara, FE, Italy
• Ospedale San Donato — Arezzo, Italy
• Azienda Ospedaliero-Universitaria S.Orsola-Malpighi Bologna — Bologna, Italy
• spedale Maggiore di Bologna — Bologna, Italy

• University of Virginia Health System — Charlottesville, Virginia, United States

• Weill Cornell Medical College — New York, United States

• the University of Hongkong-Shenzhen Hospital — Shenzhen, Guangdong, China

Not specified

• Rocky Mountain Regional VA Medical Center, Aurora, CO — Aurora, Colorado, United States

• Henry Ford Health System — Detroit, Michigan, United States
• Washington University — St Louis, Missouri, United States
• University of North Carolina, Division of Cardiology — Chapel Hill, North Carolina, United States
• Kobe University Hospital — Kobe, Japan

• Leeds Teaching Hospitals NHS Trust — Leeds, West Yorkshire, United Kingdom

Not specified