1 West of Scotland Heart and Lung Centre, NHS Golden Jubilee National Hospital, Glasgow, UK (C.B., J.C.).
2 British Heart Foundation Glasgow Cardiovascular Research Centre, School of Cardiovascular and Metabolic Health, University of Glasgow, Glasgow, UK (C.B., J.C.).
3 Cardiovascular Imaging Research Center, Medical Imaging Research Institute, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis (R.D.).