1. Minneapolis Heart Institute and Minneapolis Heart Heart Institute Foundation, Abbott Northwestern Hospital, MN (J.K., L.S., B.V.R., I.N., E.V., E.S.B.).
2. Division of Invasive Cardiology, Second Department of Internal Medicine and Cardiology Center, University of Szeged, Hungary (J.K., I.U.).
3. Henry Ford Hospital, Detroit, MI (K.A.).
4. Meshalkin Novosibirsk Research Institute, Russia (O.K.).
5. Baylor Heart and Vascular Hospital, Dallas, TX (J.W.C.).