1. Division of Cardiovascular Medicine, University of California (Davis) Medical Center, Sacramento (N.L.).
2. Department of Medicine, Baylor College of Medicine, Houston, TX (H.J.).
3. Duke Clinical Research Institute, Durham, NC (H.X., R.D.L., J.P.P., R.A.M., C.B.G., R.J.M., S.M.A.-K.).
4. Department of Medicine, Duke University School of Medicine, Durham, NC (R.D.L., J.P.P., C.B.G., R.J.M., S.M.A.-K.).
5. Department of Medicine, University at Buffalo, NY (A.B.C.).
6. Department of Medicine, Cooper Medical School of Rowan University, Camden, NJ (A.M.R.).
7. MetroHealth System Campus, Case Western Reserve University, Cleveland, OH (W.R.L.).