1. From the Department of Medicine (M.C.G., Z.Q., H.W.K., L.M., S.D., T.F., D.G.H.), Division of Cardiology, Emory University School of Medicine, Atlanta, Ga; Forenap-Pharma (K.L.), Ch-Rouffach, France; and the Department of Medicine (J.R.F.), Division of Pulmonary, Allergy, and Critical Care Medicine, Duke University Medical Center, Durham, NC.