Hopital Regional-Service de Cardiologie, Sion, Switzerland
University of British Columbia, Vancouver, British Columbia, Canada
Florida Heart Group, Orlando, Florida, United States
University of Chicago, Chicago, Illinois, United States
University of Texas, Dallas, Texas, United States
Children's National Medical Center, Washington, District of Columbia, United States
University of Michigan Health System, Ann Arbor, Michigan, United States
University of Minnesota, Minneapolis, Minnesota, United States
University of Nebraska Medical Center, Omaha, Nebraska, United States
Children's Hospital UN/CU), Omaha, Nebraska, United States
Washington University Medical Center, Saint Louis, Missouri, United States
University of Minnesota, Minneapolis, Minnesota, United States
University of Nebraska Medical Center, Omaha, Nebraska, United States