1. Duke Clinical Research Institute (K.S.P., M.F., M.N., M.F., G.M.F., C.M.O.).
2. Department of Medicine, Duke University School of Medicine, Durham, NC (K.S.P., G.M.F.).
3. ARCA Biopharma, Westminster, CO (G.D., M.R.B.).
4. Department of Medicine, University of Colorado, Aurora (P.B.-N., M.R.B.).
5. Sidney Kimmel Medical College, Philadelphia, PA (D.J.W.).
6. Department of Medicine, Ohio State University, Columbus (W.T.A.).
7. Department of Medicine, University of North Carolina at Chapel Hill (K.F.A.).
8. Department of Medicine, University of South Florida Morsani College of Medicine, Tampa (S.B.L.).
9. Inova Heart and Vascular Institute, Falls Church, VA (C.M.O.).