1. Division of Cardiovascular Disease (N.S.S., A.P., N.P., K.Y., G.A., P.A.), University of Alabama at Birmingham.
2. School of Nursing (P.L.), University of Alabama at Birmingham.
3. Department of Biostatistics (M.G.), University of Alabama at Birmingham.
4. Section of Cardiology, Birmingham Veterans Affairs Medical Center, AL (P.A.).