Mayo Clinic (Rochester, Minn.) Cleveland Clinic (Cleveland) UCLA Medical Center (Los Angeles)
Johns Hopkins Hospital (Baltimore) Massachusetts General Hospital (Boston) Cedars-Sinai Medical Center (Los Angeles)
New York-Presbyterian Hospital-Columbia and Cornell (New York) NYU Langone Hospitals (New York) UCSF Medical Center (San Francisco)
Northwestern Memorial Hospital (Chicago) University of Michigan Hospitals-Michigan Medicine (Ann Arbor, Mich.)
Stanford Health Care-Stanford Hospital (Palo Alto, Calif.) Hospitals of the University of Pennsylvania-Penn Presbyterian (Philadelphia)
Brigham and Women's Hospital (Boston) Mayo Clinic-Phoenix (Phoenix) Houston Methodist Hospital (Houston)
Barnes-Jewish Hospital (St. Louis) Mount Sinai Hospital (New York)
Rush University Medical Center (Chicago) Vanderbilt University Medical Center (Nashville, Tenn.)