[1] Univ Oslo, Oslo Univ Hosp, Rikshosp, Dept Cardiol, Oslo, Norway
[2] Georgetown Univ, MedStar Hlth Res Inst, Washington, DC USA
[3] Oregon Hlth & Sci Univ, Knight Cardiovasc Inst, Portland, OR 97201 USA
[4] VA Portland Hlth Care Syst, Portland, OR USA
[5] Leiden Univ, Dept Cardiol, Med Ctr, Leiden, Netherlands
[6] Univ Calif San Diego, San Diego, CA 92103 USA
[7] Univ Maryland, Med Ctr, Dept Diagnost Radiol & Nucl Med, Baltimore, MD 21201 USA
[8] HeartClin Hirslanden, Zurich, Switzerland
[9] Montefiore Einstein Ctr Heart & Vasc Care, Div Cardiol, Bronx, NY USA
[10] Univ Amsterdam, Dept Cardiol, Med Ctr, Amsterdam, Netherlands
[11] Northwestern Univ, Feinberg Sch Med, Dept Med, Div Cardiol, Chicago, IL 60611 USA
[12] Scuola Super St Anna Pisa, Dept Cardiol, Ist Sci Vita, Pisa, Italy
[13] Univ Belgrade, Clin Hosp Ctr Zemun, Fac Med, Dept Cardiol, Belgrade, Serbia
[14] Dept Cardiovasc Med, Div Cardiovasc Ultrasound, Rochester, MN USA
[15] Univ Leeds, Leeds Teaching Hosp NHS Trust, Leeds Inst Cardiovasc & Metab Med, Dept Biomed Imaging Sci, Leeds, W Yorkshire, England
[16] Robert Bosch Krankenhaus, Cardiologicum Stuttgart, Stuttgart, Germany
[17] Robert Bosch Krankenhaus, Dept Cardiol, Stuttgart, Germany
[18] Alta Bates Summit Med Ctr, Berkeley, CA USA
[19] Alta Bates Summit Med Ctr, Oakland, CA USA
[20] Inst Clin Physiol, CNR, Pisa, Italy
[21] Univ Virginia, Univ Virginia Hlth Syst, Div Cardiovasc Med, Hlth Ctr, Charlottesville, VA USA
[22] Univ Med & Pharm Carol Davila, Emergency Inst Cardiovasc Dis Prof Dr CC Iliescu, Dept Cardiol, Euroecolab, Bucharest, Romania