1. Division of Cardiovascular Medicine, Department of Medicine, University of California, Davis, Sacramento (N.M.D.).
2. School of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles (N.U.P.).
3. Division of Cardiology, Department of Medicine, David Geffen School of Medicine at the University of California Los Angeles (B.Z., G.C.F.).
4. Division of Cardiology, Veteran Affairs Greater Los Angeles Healthcare System, CA (B.Z.).