UniversitätsSpital Zürich, Zürich, Switzerland
Northwestern University, Chicago, Illinois, United States
Hospital at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
Sentara Norfolk General Hospital, Norfolk, Virginia, United States
University Leipzig, Leipzig, Germany
Leids Universitair Medisch Centrum, Leiden, Netherlands
Herz - und Gefäß-Klinik GmbH Bad Neustadt, Bad Neustadt, Saale, Germany
Loma Linda University School of Medicine, Loma Linda, California, United States
Universtiy of Miami, Miami, Florida, United States
Rush University Medical Center, Chicago, Illinois, United States
Alfred Hospital, Melbourne, Victoria, Australia
University of Auckland, Auckland, New Zealand
Christchurch Hospital, Christchurch, New Zealand
University of Utah, Salt Lake City, Utah, United States
A.O. San Giovanni di Dio, Agrigento, Italy
Ospedale Maggiore Bologna, Bologna, Italy
Policlinico S. Orsola - Malpighi, Bologna, Italy
University of Rochester Medical Center, Rochester, New York, United States
William Beaumont Hospital, Royal Oak, Michigan, United States
HealthEast St. Joseph's Hospital, Saint Paul, Minnesota, United States
Klinikum Coburg, Coburg, Germany
Kreisklinik Ebersberg, Ebersberg, Germany
Universitäres Herzzentrum Hamburg, Hamburg, Germany
Martin-Luther-University Halle-Wittenberg, Halle, Germany
Royal Sussex County Hospital, Brighton, United Kingdom
University of Ottawa, Ottawa, Ontario, Canada