*Cardiovascular Imaging Research Center (CIRC), Department of Cardiology and Radiology, Massachusetts General Hospital, Boston, MA; and

†Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.

Reprints: Julius C. Heemelaar, MD, Cardiovascular Imaging Research Center (CIRC),Department of Cardiology and Radiology, 175 Cambridge St, Boston, MA 02114 (e-mail: [email protected]).

T.G. Neilan has been a consultant to and received fees from Bristol Myers Squibb, Genentech, CRC Oncology, Roche, Sanofi, and Parexel Imaging Pharmaceuticals, outside of the current work. T. G. Neilan also reports grant funding from AstraZeneca and Bristol Myers Squibb outside of the current work.

The remaining authors report no conflicts of interest.