The Christ Hospital, Heart and Vascular Center, Lindner Research Center, Cincinnati, Ohio. Electronic address: lindner@thechristhospital.com. Cleveland Clinic, Cleveland, Ohio. Wellmont Holston Valley Medical Center, Kingsport, Tennessee. St. Joseph's Hospital Health Center, Liverpool, New York. Scottsdale Healthcare, Scottsdale, Arizona. Scripps Clinic, La Jolla, California. Baptist Medical Center, Jacksonville, Florida. Mount Sinai Medical Center, New York, New York. Mercy St. Vincent's Medical Center, Toledo, Ohio. New York Presbyterian Hospital, Columbia University Medical Center and the Cardiovascular Research Foundation, New York, New York. Beth Israel Deaconess Medical Center, Boston, Massachusetts. Abbott Vascular, Santa Clara, California.