1. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, OH (A.K., K.S., J.N., K.B., K.A., C.L., D.M., A.K.A., A.C.S., V.M., A.K., E.M.T., W.A.J., S.M., L.G.S., S.R.K.).
2. Division of Cardiovascular Medicine, University of Louisville, KY (A.R.K.).