1. From the Universitäts-Herzzentrum Bad Krozingen, Germany (T.Z.); Sankt Getrauden-Krankenhaus, Berlin, Germany (R.L.); Prairie Heart Institute at St. John’s Hospital, Springfield, IL (K.J.R.-S.); VasCore–the Vascular Ultrasound Core Laboratory, Massachusetts General Hospital, Boston (M.R.J.); SRH Klinikum Karlsbad-Langensteinbach, Germany (E.B.); Clinic for Angiology, University Hospital Zurich, Switzerland (B.A.-V.); Zakład Leczniczy Angio-Medicus, Krakow, Poland (M.K.); Department of Cardiovascular...