Erasmus Medical Centre, Rotterdam, Netherlands
University of Chicago, Chicago, Illinois, United States
Medical University of South Carolina, Charleston, South Carolina, United States
Mansour Parsi, MD, Cleveland, Ohio, United States
Mount Sinai Medical Center, New York, New York, United States
Dept. of Internal Medicine and Cardiological Center, Szeged, Hungary
Jeroen Bosch Ziekenhuis, 's-Hertogenbosch, Netherlands
Beaumont Hospital, Dublin, Ireland
Shin-Tokyo Hospital, Matsudo-city, Chiba-Prefecture, Japan
Juntendo University Urayasu Hospital, Urayasu, Chiba Prefecture, Japan
Kameda Medical Hospital, Kamogawa-city, Chiba, Japan
Monash Medical Centre, Clayton, Australia
The Prince Charles Hospital, Chermside, Australia
Fremantle Hospital, Fremantle, Australia
Königin Elisabeth Herzberge, Berlin, Germany
A.Z. Sint Blasius, Dendermonde, East-Flanders, Belgium
Imelda Ziekenhuis, Bonheiden, Belgium
St. Vincent's Hospital, Indianapolis, Indiana, United States
Good Samaritan Hospital, Cincinnati, Ohio, United States
Arizona Advanced Arrhythmias, Gilbert, Arizona, United States
Academisch Medisch Centrum, Amsterdam, Netherlands
Universitair Medisch Centrum, Groningen, Netherlands
Policlinico San Donato, San Donato Milanese, Italy
University of California Irvine, Orange, California, United States
Kaiser Permanente, Denver, Colorado, United States
University of Kentucky, Lexington, Kentucky, United States
National Institute of CV Diseases, Bratislava, Slovakia
University of Naples, Naples, Italy
Chilton Memorial Hospital, Pompton Plains, New Jersey, United States