[1] Leiden Univ, Med Ctr, Leiden, Netherlands
[2] Hop St Louis, Paris, France
[3] Felix Platter Hosp, Basel, Switzerland
[4] Leiden Univ, Med Ctr, Leiden, Netherlands
[5] Univ Florence, Florence, Italy
[6] Allgemeines Krankenhaus, Vienna, Austria
[7] Hop Purpan, Toulouse, France
[8] CHU Grenoble, Grenoble, France
[9] Hop St Andre, Bordeaux, France
[10] Hop St Bernard, Poitiers, France
[11] CHU Montpellier, Montpellier, France
[12] Hop Conception, Marseille, France
[13] Hop Hautepierre, Strasbourg, France
[14] Klin JW Goethe Uni, Frankfurt, Germany
[15] Univ Freiburg, Freiburg, Germany
[16] Med Uni Tubingen, Tubingen, Germany
[17] Med Uni Wurzburg, Wurzburg, Germany
[18] Papworth Hosp, Thessaloniki, Greece
[19] VU MC, Amsterdam, Netherlands
[20] UMCN, Nijmegen, Netherlands
[21] Insel Spital, Bern, Switzerland
[22] Leeds Gen Infirmary, Leeds, W Yorkshire, England
[23] Kantonspital, Basel, Switzerland