1. Department of Medicine (N.S., S.M.A.), Stanford University, CA.
2. Division of Cardiovascular Medicine (T.J.B., D.K.A., P.A.H., C.M.Y.), Stanford University, CA.
3. Cardiovascular Institute (T.J.B., D.K.A., P.A.H., C.M.Y.), Stanford University, CA.
4. Veterans Affairs Palo Alto Healthcare System, CA (S.M.A., P.A.H., C.M.Y.).