Barnes-Jewish Hospital, St. Louis, Missouri, United States
Mayo Clinic, Rochester, Minnesota, United States
University of California, San Francisco, San Francisco, California, United States
Massachusetts General Hospital, Boston, Massachusetts, United States
Allegheny General Hospital, Pittsburgh, Pennsylvania, United States
Stanford University Medical Center, Stanford, California, United States
Herz-Zentrum, Bad Krozingen, Germany
Universitatsklinikum Magdeburg, Magdeburg, Germany
Gemeinschaftspraxis, Leipzig, Germany
Heart Center Leipzig/Park Hospital, Leipzig, Germany
Klinikum Rosenheim, Rosenheim, Germany
Endosurgery and Lithotripsy Center, Moscow, Russian Federation
King Khalid University Hospital, Riyadh, Saudi Arabia
Fairfield Medical Center, Lancaster, Ohio, United States
Munroe Regional Medical Center, Ocala, Florida, United States
Wake Med Raleigh Campus, Raleigh, North Carolina, United States
Cedars-Sinai Medical Center, Los Angeles, California, United States
Mount Sinai Medical Center, New York, New York, United States
Univeristy Hospitals Medical Center, Cleveland, Ohio, United States
Krankenhaus Waldfriede, Berlin, Germany
End-und Dickdarmzentrum Hannover, Hannover, Germany
Enddarmzentrum Mannheim, Mannheim, Germany
Instituto di Clinical Chirurgica, Rome, Italy
Hospital de Erasme, Brussels, Belgium
Amsterdam Academic Medical Center, Amsterdam, Netherlands