1. Riverside Methodist Hospital, Upper Arlington, OH (A.K.A.).
2. Medical University of South Carolina, Charleston (M.R.G.).
3. CorVita Science Foundation, Chicago, IL (M.C.B.).
4. Northwestern University Feinberg School of Medicine, Chicago, IL (B.P.K.).
5. Division of Cardiovascular Medicine, Ohio State University Medical Center, Columbus (M.R.R., R.W.).
6. Boston Scientific, St Paul, MN (E.D., M.H., W.K.S.).