[1
]
Medstar Heart Institute at the Washington Hospital Center, Washington, District of
Columbia.
[2
]
Vall d'Hebron University Hospital, Barcelona, Spain.
[3
]
University of Texas Southwestern Medical Center, Dallas, Texas.
[4
]
National Institute of Health, Bethesda, Maryland.
[5
]
University of Padua, Padua, Italy.
[6
]
Cleveland Clinic, Cleveland, Ohio.
[7
]
Mayo Clinic, Rochester, Minnesota.
[8
]
University Hospital Zurich, Zurich, Switzerland.
[9
]
Weill Cornell Medical College, New York, New York.
[10
]
West-German Heart Center, University Duisburg-Essen, Essen, Germany.
[11
]
San Salvatore Hospital, Pesaro, Italy.
[12
]
Massachusetts General Hospital, Boston, Massachusetts.
[13
]
Methodist DeBakey Heart & Vascular Center, Houston, Texas.
[14
]
University of Rostock, Rostock, Germany.
[15
]
Centro Cardiologico Monzino, IRCCS, Milan, Italy.
[16
]
University Hospital Ramón y Cajal, Madrid, Spain.
[17
]
Johns Hopkins University School of Medicine, Baltimore, Maryland.
[18
]
University of Michigan, Ann Arbor, Michigan.
[19
]
Yale University School of Medicine, New Haven, Connecticut.
[20
]
Hopital Bichat, Paris, France.
[21
]
Hopital de Rangueil, Toulouse, France.
[22
]
AZ St Jan Brugge, Brugge, Belgium.