The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
Heart and Vascular Center of Arizona, Phoenix, Arizona, United States
UCLA Medical Center, Los Angeles, California, United States
Swedish Medical Center, Seattle, Washington, United States
Heart and Vascular Center of Arizona, Phoenix, Arizona, United States
University of Alabama, Birmingham, Birmingham, Alabama, United States
Columbia University Medical Center, New York, New York, United States