[1] Imperial Coll, London, England
[2] Univ Amsterdam, Acad Med Ctr, Amsterdam, Netherlands
[3] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA
[4] Houston Methodist DeBakey Heart & Vasc Ctr, Houston, TX USA
[5] Ohio State Univ, Columbus, OH 43210 USA
[6] Med Ctr Leeuwarden, Leeuwarden, Netherlands
[7] Med Ctr Leeuwarden, Ctr Heart, Leeuwarden, Netherlands
[8] McGill Univ, Ctr Hlth, Montreal, PQ, Canada
[9] Erasmus MC, Thoraxctr, Rotterdam, Netherlands
[10] Erasmus Univ, Med Ctr, Dept Cardiothorac Surg, Rotterdam, Netherlands