From the University of California San Diego, San Diego, CA (U.B-G., K.A.); Medtronic, Inc, Minneapolis, MN (L.L.R., A.I.A.); Florida Hospital Cardiovascular Institute, Orlando, FL (G.M.); Mid-Carolina Cardiology, Charlotte, NC (J.R.B.); University of Maryland Medical Center, Baltimore MD (S.R.S.); Stanford University, Stanford, CA (H.H.H.); and Mayo Clinic, Rochester, MN (P.A.F.). (At 2012-12)