Digestive Associates of Houston, Houston, Texas, United States
Evanston Northwestern Healthcare, Evanston, Illinois, United States
Stony brook University Medical Center, Stony brook, New York, United States
Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States
Virginia Mason Medical Center, Seattle, Washington, United States
St. Michael's Hospital, Toronto, Ontario, Canada
Mayo Clinic, Rochester, Minnesota, United States
Medical University of South Carolina, Charleston, South Carolina, United States
Cedars Sinai Medical Center, Los Angeles, California, United States
Evangelisches Krankenhaus, Dusseldorf, Germany
Klinikum Ludwigsburg, Ludwigsburg, Germany
Medizinische Klinik und Poliklinik Universitatsklinikum Leipzig, Leipzig, Germany
Tri Valley Gastroenterology, San Ramon, California, United States
Lenox Hill Hospital, New York, New York, United States
University of California at Irvine Medical Center, Orange, California, United States