[1] Univ Spital Zurich, Zurich, Switzerland
[2] Inst Univ Cardiol & Pneumol, Quebec City, PQ, Canada
[3] Univ Copenhagen, Rigshosp, Copenhagen, Denmark
[4] Montreal Heart Inst, Montreal, PQ, Canada
[5] Hop Sacre Coeur, Montreal, PQ, Canada
[6] Galway Univ Hosp, Galway, Ireland
[7] New Brunswick Heart Ctr, St John, NB, Canada
[8] Montreal Heart Inst, Montreal, PQ, Canada