1. Department of Medicine (A.H.), Vanderbilt University Medical Center, Nashville, TN.
2. Department of Biomedical Engineering (M.M.H.S., J.D.), Duke University, Durham, NC.
3. Vanderbilt Institute of Clinical and Translational Research (H.M.), Vanderbilt University Medical Center, Nashville, TN.
4. Department of Biostatistics and Bioinformatics (J.D.), Duke University, Durham, NC.
5. Division of Cardiovascular Medicine (E.B.), Vanderbilt University Medical Center, Nashville, TN.