1 Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California.
2 Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California.
3 Department of Medicine, Division of Cardiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
4 Department of Population Sciences, City of Hope Comprehensive Cancer Center, Duarte, California.
5 Department of Medicine, Division of Cardiology, Northwestern Memorial Hospital, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
6 Department of Radiology, Stanford University School of Medicine, Stanford, California.