1. From Columbia University Medical Center, New York-Presbyterian Hospital, New York University Langone Medical Center, and Cardiovascular Research Foundation, New York, New York; University of British Columbia, Vancouver, British Columbia, Canada; Mayo Clinic, Rochester, Minnesota; Saint Luke's Mid-America Heart Institute, Kansas City, Missouri; Duke Clinical Research Institute, Durham, North Carolina; Baylor Healthcare System, Dallas, Texas; Cleveland Clinic Foundation, Cleveland, Ohio;
2. Emory University School of Medicine, Atlanta, Georgia; and MedStar Health Research Institute, Washington, DC.