Montreal Heart Institute, Montreal, Quebec, Canada
St. Paul´s Hospital Providence Health Care, Vancouver, Canada
Centre Hospitalier de Lyon, Bron, France
Charité Berlin, Berlin, Germany
Universitätsklinikum Bonn, Bonn, Germany
Universität Leipzig - Herzzentrum, Leipzig, Germany
Anderson Area Medical Center, Anderson, South Carolina, United States
Magistratsabeilung 70, Wiener, Wien, Austria
Universitats-Klinik Fur, Wien, Austria
Odense Universitets Hospital, Odense, Denmark
Centre Hospitalier Universitaire de Caen, Caen, France
Medizinische Klinik I Kardiologie/Pneumologie/Internistische, Rostock, Germany
The Cleveland Clinic, Cleveland, Ohio, United States
Jackson Hospital, Montgomery, Alabama, United States
Louisiana State University Health Sciences Center, Baton Rouge, Louisiana, United States
Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States
Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, United States
Scripps Clinic / Scripps Green Hospital, La Jolla, California, United States
Duke Clinical Research Institute, Durham, North Carolina, United States