[1] Erasmus Sch Ctr, Dept Cardiol, NL-3000 CA Rotterdam, Netherlands
[2] Sahlgrens Univ Hosp, S-41345 Gothenburg, Sweden
[3] Univ Zurich Hosp, Dept Internal Med, Zurich, Switzerland
[4] Castle Hill Hosp, Dept Cardiol, Kingston Upon Hull, Yorks, England
[5] Hop La Pitie Salpetriere, Dept Cardiol, Paris, France