[1] Leiden Univ, Med Ctr, Leiden, Netherlands
[2] Clin Univ St Luc, Brussels, Belgium
[3] Univ Pittsburgh, Med Ctr UPMC, Pittsburgh, PA USA
[4] Robert Bosch Krankenhaus, Stuttgart, Germany
[5] Homolce Hosp, Prague, Czech Republic
[6] San Camillo Hosp, Rome, Italy
[7] Liverpool Heart & Chest, Liverpool, Merseyside, England
[8] ISALA Hosp, Zwolle, Netherlands
[9] Hosp Clin Barcelona, Barcelona, Spain
[10] Ziekenhuis Oost Limburg, Genk, Belgium
[11] Maastricht Univ, Med Ctr, Maastricht, Netherlands
[12] Univ Med Ctr Utrecht, Utrecht, Netherlands
[13] Onze Lieve Vrouw Hosp, Aalst, Belgium
[14] Imelda Hosp Bonheiden, Bonheiden, Belgium
[15] Univ Hosp Hradec Kralove, Hradec Kralove, Czech Republic
[16] MONZA Hosp, Bucharest, Romania
[17] Univ Hlth Sci, Istanbul Mehmet Akif Ersoy Cardiovasc Surg Hosp, Istanbul, Turkey
[18] Gulhane Educ Res Hosp, Ankara, Turkey
[19] Acibadem Univ, Acibadem Maslak Hosp, Istanbul, Turkey
[20] Univ Hosp Zurich, Zurich, Switzerland
[21] UC Louvain, CHU UCL Namur, Godinne, Belgium
[22] CHU Dijon, Dijon, France
[23] Univ Hosp Bordeaux, Bordeaux, France
[24] Humanita Gavazzeni, Bergamo, Italy
[25] Univ Hosp Ghent, Ghent, Belgium
[26] Erasme Hosp Brussels, Brussels, Belgium
[27] Henri MONDOR Hosp, AP HP, Creteil, France
[28] Cent Clin Hosp Minist Interior & Adm, Ctr Postgrad Med Educ, Warsaw, Poland
[29] AZ Maria Middelares, Ghent, Belgium
[30] Private Hosp Jacques Cartier, Cardiovasc Inst Paris Sud, Massy, France
[31] Katholieke Univ Leuven, Dept Cardiovasc Sci, Univ Hosp Leuven, Leuven, Belgium