1 From the Division of Cardiology, Duke University Medical Center, Durham, NC (R.A.K., T.M.B.); and Duke Clinical Research Institute, Durham, NC (R.A.K.). richard.krasuski@duke.edu.
2 From the Division of Cardiology, Duke University Medical Center, Durham, NC (R.A.K., T.M.B.); and Duke Clinical Research Institute, Durham, NC (R.A.K.).