1. State University Hospital Skopje, Skopje, Macedonia
2. Ghent University Hospital, Ghent, Belgium
3. Würzburg University Hospital, Würzburg, Germany
4. Raymond Poincaré Hospital, University of Versailles Saint Quentin, Paris, France
5. Newcastle Hospitals and Newcastle University, Newcastle, UK
6. Sacré-Coeur Hospital, University of Montreal, Montreal, Quebec, Canada
7. Erasmus University Hospital, Brussels, Belgium
8. Erasmus Medical Centre, Rotterdam, The Netherlands
9. Nice University Hospital, Nice, France
10. Innsbruck University Hospital, Innsbruck, Austria
11. KH Elisabethinen Linz, Linz, Austria
12. Amsterdam Medical Centre, Amsterdam, The Netherlands