1. From the Departments of Medicine, Nashville VA Medical Center (GRECC), and Vanderbilt University, Nashville, Tenn (J.H.N., J.E.L.); Department of Medicine, New England Medical Center, Boston, Mass (B.L.F.); Division of Cardiology, University of Alberta Hospital, Edmonton, Alberta, Canada (S.L.A.); Department of Medicine, University of Colorado Health Science Center, Denver, Colo (D.B.B., D.M.R., N.F.V.); Pulmonary Hypertension Center (R.J.B.) and Department of Medicine (J.A.K., J.M.), Columbia...