1 From the Division of Cardiology, Tufts Cardiovascular Center, Boston, MA (M.S.K.); and Division of Cardiology, University of North Carolina, Chapel Hill (J.N.K.). mkiernan@tuftsmedicalcenter.org.
2 From the Division of Cardiology, Tufts Cardiovascular Center, Boston, MA (M.S.K.); and Division of Cardiology, University of North Carolina, Chapel Hill (J.N.K.).