1 Department of Cardiology, Emory University School of Medicine, Atlanta, Georgia.
2 Department of Cardiology, Johns Hopkins University, Baltimore, Maryland.
3 Department of Surgery Research, Mayo Clinic, Rochester, Minnesota.
4 Department of Cardiology, Barbra Streisand Women's Heart Center, Cedars-Sinai Heart Institute, Los Angeles, California. Electronic address: merz@cshs.org.