1. Division of Cardiovascular Medicine, Krannert Cardiovascular Research Center, Indiana University, Indianapolis (O.J.I., K.B., S.V.R.).
2. University of Miami School of Nursing and Health Studies, Coral Gables, FL (D.C.V.).
3. Downstate Medical Center, State University of New York, Brooklyn (M.C.-R.).
4. Cedars-Sinai Schmidt Heart Institute, Los Angeles, CA (J.A.K.).
5. University of Colorado School of Medicine, Aurora (L.A.A.).