Universitatsklinikum Halle (Saale), Halle, Germany
Slaskie Centrum Chorob Serca, Zabrze, Poland
Centro Hospitalar de Lisboa Ocidental, E.P.E. Hospital de Santa Cruz, Carnaxide, Portugal
Hospital de Santa Maria-Centro Hospitalar Lisboa Norte, EPE, Lisboa, Portugal
Universitätsklinikum Freiburg Klinik für Hals, Nasen und Ohrenheilkunde, Freiburg, Germany
Katholisches Krankenhaus Hagen, Hagen, Germany
Städtisches Klinikum Karlsruhe GmbH, Karlsruhe, Germany
Cedars Sinai Medical Center, Los Angeles, California, United States
Children's Hospital Colorado, Denver, Colorado, United States
Rush, Chicago, Illinois, United States
Middlesbrough, Middlesbrough, United Kingdom
Madrid, Madrid, Spain
Wilrijk, Wilrijk, Belgium
Clinique Pasteur, Toulouse, France
Hopital Europeen Georges-Pompidou, Paris, France
Hopitaux Universitaires de Strasbourg - Nouvel Hopital Civil, Strasbourg, France
Staten Island University Hospital, Staten Island, New York, United States
Cedars-Sinai Heart Institute, Los Angeles, California, United States
Medstar Washington Hospital, Washington D.C., District of Columbia, United States
The Christ Hospital Health Network, Cincinati, Ohio, United States
Central Manchester University Hospitals NHS - mancester Royal Infirmary, Manchester, United Kingdom
University Hospitals of Birmingham NHS Foundation Trust - Queen Elizabeth Hospital, Birmingham, United Kingdom