[1] Sahlgrens Univ Hosp, Gothenburg, Sweden
[2] Danderyd Hosp, Dept Cardiol, S-18288 Danderyd, Sweden
[3] St Franciscus Gasthuis, Dept Cardiol, Rotterdam, Netherlands
[4] Louis Pasteur Univ Hosp, Kosice, Slovakia
[5] Capio St Gorans Hosp, Dept Med, Stockholm, Sweden
[6] Hosp Arnaud Villeneuve, Montpellier, France
[7] Med Ctr Haaglanden, The Hague, Netherlands
[8] Klinikum Dahme Spreewald GmbH, Spreewaldklin Lubben, Lubben, Germany
[9] Hosp Links Weser, Bremen, Germany
[10] James Cook Univ Hosp, Middlesbrough, Cleveland, England