[1] Kantonsspital Graubuenden, Dept Radiol, Loestr 170, CH-7000 Chur, Switzerland
[2] Univ Bern, Bern Univ Hosp, Inst Diagnost Intervent & Pediat Radiol, Inselspital, Freiburgstr 10, CH-3010 Bern, Switzerland
[3] Univ Wisconsin, Dept Biostat & Med Informat, 610 Walnut St, Madison, WI 53726 USA
[4] Johns Hopkins Univ, Dept Radiol, 600 N Wolfe St, Baltimore, MD 21287 USA
[5] UCL, MRC Unit Lifelong Hlth & Ageing, 5-19 Torrington Pl, London WC1E 7HB, England
[6] Royal Free Hosp NHS Fdn Trust, Inherited Heart Muscle Condit Clin, London NW3 2QG, England
[7] Univ Wisconsin, Dept Radiol, Sch Med & Publ Hlth, 600 Highland Ave, Madison, WI 53792 USA
[8] Brigham & Womens Hosp, Dept Radiol, 75 Francis St, Boston, MA 02115 USA
[9] Univ Virginia Hlth Syst, Cardiovasc Div, 1215 Lee St, Charlottesville, VA 22908 USA
[10] Natl Jewish Hlth, Dept Radiol, 1400 Jackson St, Denver, CO 80206 USA
[11] Univ Childrens Hosp Zurich, Div Paediat Cardiol, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[12] Leiden Univ, Dept Radiol, Med Ctr, Albinusdreef 2, NL-2333 ZA Leiden, Netherlands